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flycast/core/rend/gles/gles.cpp

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#include <math.h>
#include "glcache.h"
#include "rend/TexCache.h"
#include "cfg/cfg.h"
#include "rend/gui.h"
#ifdef TARGET_PANDORA
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/fb.h>
#ifndef FBIO_WAITFORVSYNC
#define FBIO_WAITFORVSYNC _IOW('F', 0x20, __u32)
#endif
int fbdev = -1;
#endif
#ifndef GLES
#if HOST_OS != OS_DARWIN
#include <GL3/gl3w.c>
#pragma comment(lib,"Opengl32.lib")
#endif
#else
#ifndef GL_RED
#define GL_RED 0x1903
#endif
#ifndef GL_MAJOR_VERSION
#define GL_MAJOR_VERSION 0x821B
#endif
#endif
/*
GL|ES 2
Slower, smaller subset of gl2
*Optimisation notes*
Keep stuff in packed ints
Keep data as small as possible
Keep vertex programs as small as possible
The drivers more or less suck. Don't depend on dynamic allocation, or any 'complex' feature
as it is likely to be problematic/slow
Do we really want to enable striping joins?
*Design notes*
Follow same architecture as the d3d renderer for now
Render to texture, keep track of textures in GL memory
Direct flip to screen (no vlbank/fb emulation)
Do we really need a combining shader? it is needlessly expensive for openGL | ES
Render contexts
Free over time? we actually care about ram usage here?
Limit max resource size? for psp 48k verts worked just fine
FB:
Pixel clip, mapping
SPG/VO:
mapping
TA:
Tile clip
*/
#include "oslib/oslib.h"
#include "rend/rend.h"
float fb_scale_x,fb_scale_y;
float scale_x, scale_y;
//Fragment and vertex shaders code
const char* VertexShaderSource =
"\
%s \n\
#define TARGET_GL %s \n\
#define pp_Gouraud %d \n\
\n\
#define GLES2 0 \n\
#define GLES3 1 \n\
#define GL2 2 \n\
#define GL3 3 \n\
\n\
#if TARGET_GL == GL2 \n\
#define highp \n\
#define lowp \n\
#define mediump \n\
#endif \n\
#if TARGET_GL == GLES2 || TARGET_GL == GL2 \n\
#define in attribute \n\
#define out varying \n\
#endif \n\
\n\
\n\
#if TARGET_GL == GL3 || TARGET_GL == GLES3 \n\
#if pp_Gouraud == 0 \n\
#define INTERPOLATION flat \n\
#else \n\
#define INTERPOLATION smooth \n\
#endif \n\
#else \n\
#define INTERPOLATION \n\
#endif \n\
\n\
/* Vertex constants*/ \n\
uniform highp vec4 scale; \n\
uniform highp vec4 depth_scale; \n\
uniform highp float extra_depth_scale; \n\
/* Vertex input */ \n\
in highp vec4 in_pos; \n\
in lowp vec4 in_base; \n\
in lowp vec4 in_offs; \n\
in mediump vec2 in_uv; \n\
/* output */ \n\
INTERPOLATION out lowp vec4 vtx_base; \n\
INTERPOLATION out lowp vec4 vtx_offs; \n\
out mediump vec2 vtx_uv; \n\
void main() \n\
{ \n\
vtx_base=in_base; \n\
vtx_offs=in_offs; \n\
vtx_uv=in_uv; \n\
highp vec4 vpos = in_pos; \n\
if (vpos.z < 0.0 || vpos.z > 3.4e37) \n\
{ \n\
gl_Position = vec4(0.0, 0.0, 1.0, 1.0 / vpos.z); \n\
return; \n\
} \n\
\n\
vpos.w = extra_depth_scale / vpos.z; \n\
#if TARGET_GL != GLES2 \n\
vpos.z = vpos.w; \n\
#else \n\
vpos.z=depth_scale.x+depth_scale.y*vpos.w; \n\
#endif \n\
vpos.xy=vpos.xy*scale.xy-scale.zw; \n\
vpos.xy*=vpos.w; \n\
gl_Position = vpos; \n\
}";
const char* PixelPipelineShader =
"\
%s \n\
#define TARGET_GL %s \n\
\n\
#define cp_AlphaTest %d \n\
#define pp_ClipTestMode %d \n\
#define pp_UseAlpha %d \n\
#define pp_Texture %d \n\
#define pp_IgnoreTexA %d \n\
#define pp_ShadInstr %d \n\
#define pp_Offset %d \n\
#define pp_FogCtrl %d \n\
#define pp_Gouraud %d \n\
#define pp_BumpMap %d \n\
#define FogClamping %d \n\
#define pp_TriLinear %d \n\
#define PI 3.1415926 \n\
\n\
#define GLES2 0 \n\
#define GLES3 1 \n\
#define GL2 2 \n\
#define GL3 3 \n\
\n\
#if TARGET_GL == GL2 \n\
#define highp \n\
#define lowp \n\
#define mediump \n\
#endif \n\
#if TARGET_GL == GLES3 \n\
out highp vec4 FragColor; \n\
#define gl_FragColor FragColor \n\
#define FOG_CHANNEL a \n\
#elif TARGET_GL == GL3 \n\
out highp vec4 FragColor; \n\
#define gl_FragColor FragColor \n\
#define FOG_CHANNEL r \n\
#else \n\
#define in varying \n\
#define texture texture2D \n\
#define FOG_CHANNEL a \n\
#endif \n\
\n\
\n\
#if TARGET_GL == GL3 || TARGET_GL == GLES3 \n\
#if pp_Gouraud == 0 \n\
#define INTERPOLATION flat \n\
#else \n\
#define INTERPOLATION smooth \n\
#endif \n\
#else \n\
#define INTERPOLATION \n\
#endif \n\
\n\
/* Shader program params*/ \n\
/* gles has no alpha test stage, so its emulated on the shader */ \n\
uniform lowp float cp_AlphaTestValue; \n\
uniform lowp vec4 pp_ClipTest; \n\
uniform lowp vec3 sp_FOG_COL_RAM,sp_FOG_COL_VERT; \n\
uniform highp float sp_FOG_DENSITY; \n\
uniform sampler2D tex,fog_table; \n\
uniform lowp float trilinear_alpha; \n\
uniform lowp vec4 fog_clamp_min; \n\
uniform lowp vec4 fog_clamp_max; \n\
uniform highp float extra_depth_scale; \n\
/* Vertex input*/ \n\
INTERPOLATION in lowp vec4 vtx_base; \n\
INTERPOLATION in lowp vec4 vtx_offs; \n\
in mediump vec2 vtx_uv; \n\
\n\
lowp float fog_mode2(highp float w) \n\
{ \n\
highp float z = clamp(w * extra_depth_scale * sp_FOG_DENSITY, 1.0, 255.9999); \n\
highp float exp = floor(log2(z)); \n\
highp float m = z * 16.0 / pow(2.0, exp) - 16.0; \n\
lowp float idx = floor(m) + exp * 16.0 + 0.5; \n\
highp vec4 fog_coef = texture(fog_table, vec2(idx / 128.0, 0.75 - (m - floor(m)) / 2.0)); \n\
return fog_coef.FOG_CHANNEL; \n\
} \n\
\n\
highp vec4 fog_clamp(lowp vec4 col) \n\
{ \n\
#if FogClamping == 1 \n\
return clamp(col, fog_clamp_min, fog_clamp_max); \n\
#else \n\
return col; \n\
#endif \n\
} \n\
\n\
void main() \n\
{ \n\
// Clip outside the box \n\
#if pp_ClipTestMode==1 \n\
if (gl_FragCoord.x < pp_ClipTest.x || gl_FragCoord.x > pp_ClipTest.z \n\
|| gl_FragCoord.y < pp_ClipTest.y || gl_FragCoord.y > pp_ClipTest.w) \n\
discard; \n\
#endif \n\
// Clip inside the box \n\
#if pp_ClipTestMode==-1 \n\
if (gl_FragCoord.x >= pp_ClipTest.x && gl_FragCoord.x <= pp_ClipTest.z \n\
&& gl_FragCoord.y >= pp_ClipTest.y && gl_FragCoord.y <= pp_ClipTest.w) \n\
discard; \n\
#endif \n\
\n\
lowp vec4 color=vtx_base; \n\
#if pp_UseAlpha==0 \n\
color.a=1.0; \n\
#endif\n\
#if pp_FogCtrl==3 \n\
color=vec4(sp_FOG_COL_RAM.rgb,fog_mode2(gl_FragCoord.w)); \n\
#endif\n\
#if pp_Texture==1 \n\
{ \n\
lowp vec4 texcol=texture(tex, vtx_uv); \n\
\n\
#if pp_BumpMap == 1 \n\
highp float s = PI / 2.0 * (texcol.a * 15.0 * 16.0 + texcol.r * 15.0) / 255.0; \n\
highp float r = 2.0 * PI * (texcol.g * 15.0 * 16.0 + texcol.b * 15.0) / 255.0; \n\
texcol.a = clamp(vtx_offs.a + vtx_offs.r * sin(s) + vtx_offs.g * cos(s) * cos(r - 2.0 * PI * vtx_offs.b), 0.0, 1.0); \n\
texcol.rgb = vec3(1.0, 1.0, 1.0); \n\
#else\n\
#if pp_IgnoreTexA==1 \n\
texcol.a=1.0; \n\
#endif\n\
\n\
#if cp_AlphaTest == 1 \n\
if (cp_AlphaTestValue>texcol.a) discard;\n\
#endif \n\
#endif \n\
#if pp_ShadInstr==0 \n\
{ \n\
color=texcol; \n\
} \n\
#endif\n\
#if pp_ShadInstr==1 \n\
{ \n\
color.rgb*=texcol.rgb; \n\
color.a=texcol.a; \n\
} \n\
#endif\n\
#if pp_ShadInstr==2 \n\
{ \n\
color.rgb=mix(color.rgb,texcol.rgb,texcol.a); \n\
} \n\
#endif\n\
#if pp_ShadInstr==3 \n\
{ \n\
color*=texcol; \n\
} \n\
#endif\n\
\n\
#if pp_Offset==1 && pp_BumpMap == 0 \n\
{ \n\
color.rgb+=vtx_offs.rgb; \n\
} \n\
#endif\n\
} \n\
#endif\n\
\n\
color = fog_clamp(color); \n\
\n\
#if pp_FogCtrl == 0 \n\
{ \n\
color.rgb=mix(color.rgb,sp_FOG_COL_RAM.rgb,fog_mode2(gl_FragCoord.w)); \n\
} \n\
#endif\n\
#if pp_FogCtrl == 1 && pp_Offset==1 && pp_BumpMap == 0 \n\
{ \n\
color.rgb=mix(color.rgb,sp_FOG_COL_VERT.rgb,vtx_offs.a); \n\
} \n\
#endif\n\
\n\
#if pp_TriLinear == 1 \n\
color *= trilinear_alpha; \n\
#endif \n\
\n\
#if cp_AlphaTest == 1 \n\
color.a=1.0; \n\
#endif \n\
//color.rgb=vec3(gl_FragCoord.w * sp_FOG_DENSITY / 128.0);\n\
#if TARGET_GL != GLES2 \n\
highp float w = gl_FragCoord.w * 100000.0; \n\
gl_FragDepth = log2(1.0 + w) / 34.0; \n\
#endif \n\
gl_FragColor =color; \n\
}";
const char* ModifierVolumeShader =
"\
%s \n\
#define TARGET_GL %s \n\
\n\
#define GLES2 0 \n\
#define GLES3 1 \n\
#define GL2 2 \n\
#define GL3 3 \n\
\n\
#if TARGET_GL == GL2 \n\
#define highp \n\
#define lowp \n\
#define mediump \n\
#endif \n\
#if TARGET_GL != GLES2 && TARGET_GL != GL2 \n\
out highp vec4 FragColor; \n\
#define gl_FragColor FragColor \n\
#endif \n\
\n\
uniform lowp float sp_ShaderColor; \n\
/* Vertex input*/ \n\
void main() \n\
{ \n\
#if TARGET_GL != GLES2 \n\
highp float w = gl_FragCoord.w * 100000.0; \n\
gl_FragDepth = log2(1.0 + w) / 34.0; \n\
#endif \n\
gl_FragColor=vec4(0.0, 0.0, 0.0, sp_ShaderColor); \n\
}";
const char* OSD_Shader =
"\
%s \n\
#define TARGET_GL %s \n\
\n\
#define GLES2 0 \n\
#define GLES3 1 \n\
#define GL2 2 \n\
#define GL3 3 \n\
\n\
#if TARGET_GL == GL2 \n\
#define highp \n\
#define lowp \n\
#define mediump \n\
#endif \n\
#if TARGET_GL != GLES2 && TARGET_GL != GL2 \n\
out highp vec4 FragColor; \n\
#define gl_FragColor FragColor \n\
#else \n\
#define in varying \n\
#define texture texture2D \n\
#endif \n\
\n\
#if TARGET_GL == GL3 || TARGET_GL == GLES3 \n\
#define INTERPOLATION smooth \n\
#else \n\
#define INTERPOLATION \n\
#endif \n\
\n\
INTERPOLATION in lowp vec4 vtx_base; \n\
in mediump vec2 vtx_uv; \n\
/* Vertex input*/ \n\
uniform sampler2D tex; \n\
void main() \n\
{ \n\
mediump vec2 uv=vtx_uv; \n\
uv.y=1.0-uv.y; \n\
gl_FragColor = vtx_base*texture(tex,uv.st); \n\
}";
GLCache glcache;
gl_ctx gl;
int screen_width;
int screen_height;
GLuint fogTextureId;
#if (HOST_OS != OS_DARWIN) && !defined(TARGET_NACL32)
#if defined(GLES) && !defined(USE_SDL)
// Create a basic GLES context
bool gl_init(void* wind, void* disp)
{
#if !defined(_ANDROID)
gl.setup.native_wind=(EGLNativeWindowType)wind;
gl.setup.native_disp=(EGLNativeDisplayType)disp;
//try to get a display
gl.setup.display = eglGetDisplay(gl.setup.native_disp);
//if failed, get the default display (this will not happen in win32)
if(gl.setup.display == EGL_NO_DISPLAY)
gl.setup.display = eglGetDisplay((EGLNativeDisplayType) EGL_DEFAULT_DISPLAY);
// Initialise EGL
EGLint maj, min;
if (!eglInitialize(gl.setup.display, &maj, &min))
{
printf("EGL Error: eglInitialize failed\n");
return false;
}
printf("Info: EGL version %d.%d\n",maj,min);
if (gl.setup.surface == 0)
{
EGLint pi32ConfigAttribs[] = { EGL_SURFACE_TYPE, EGL_WINDOW_BIT, EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT , EGL_DEPTH_SIZE, 24, EGL_STENCIL_SIZE, 8, EGL_NONE };
EGLint pi32ContextAttribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2 , EGL_NONE };
int num_config;
EGLConfig config;
if (!eglChooseConfig(gl.setup.display, pi32ConfigAttribs, &config, 1, &num_config) || (num_config != 1))
{
printf("EGL Error: eglChooseConfig failed\n");
return false;
}
gl.setup.surface = eglCreateWindowSurface(gl.setup.display, config, (EGLNativeWindowType)wind, NULL);
if (eglCheck() || gl.setup.surface == EGL_NO_SURFACE)
{
printf("EGL Error: eglCreateWindowSurface failed\n");
return false;
}
eglBindAPI(EGL_OPENGL_ES_API);
if (eglCheck())
return false;
gl.setup.context = eglCreateContext(gl.setup.display, config, NULL, pi32ContextAttribs);
if (eglCheck())
return false;
}
#endif
eglMakeCurrent(gl.setup.display, gl.setup.surface, gl.setup.surface, gl.setup.context);
if (eglCheck())
return false;
EGLint w,h;
eglQuerySurface(gl.setup.display, gl.setup.surface, EGL_WIDTH, &w);
eglQuerySurface(gl.setup.display, gl.setup.surface, EGL_HEIGHT, &h);
screen_width=w;
screen_height=h;
// Required when doing partial redraws
if (!eglSurfaceAttrib(gl.setup.display, gl.setup.surface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED))
{
printf("Swap buffers are not preserved. Last frame copy enabled\n");
gl.swap_buffer_not_preserved = true;
}
printf("EGL config: %p, %p, %p %dx%d\n",gl.setup.context,gl.setup.display,gl.setup.surface,w,h);
return true;
}
void egl_stealcntx()
{
gl.setup.context=eglGetCurrentContext();
gl.setup.display=eglGetCurrentDisplay();
gl.setup.surface=eglGetCurrentSurface(EGL_DRAW);
}
//swap buffers
void gl_swap()
{
#ifdef TARGET_PANDORA0
if (fbdev >= 0)
{
int arg = 0;
ioctl(fbdev,FBIO_WAITFORVSYNC,&arg);
}
#endif
eglSwapBuffers(gl.setup.display, gl.setup.surface);
}
//destroy the gles context and free resources
void gl_term()
{
#if HOST_OS==OS_WINDOWS
ReleaseDC((HWND)gl.setup.native_wind,(HDC)gl.setup.native_disp);
#endif
#ifdef TARGET_PANDORA
eglMakeCurrent( gl.setup.display, NULL, NULL, EGL_NO_CONTEXT );
if (gl.setup.context)
eglDestroyContext(gl.setup.display, gl.setup.context);
if (gl.setup.surface)
eglDestroySurface(gl.setup.display, gl.setup.surface);
if (gl.setup.display)
eglTerminate(gl.setup.display);
if (fbdev>=0)
close( fbdev );
fbdev=-1;
gl.setup.context=0;
gl.setup.surface=0;
gl.setup.display=0;
#endif
}
#else
#if HOST_OS == OS_WINDOWS
#define WGL_DRAW_TO_WINDOW_ARB 0x2001
#define WGL_ACCELERATION_ARB 0x2003
#define WGL_SWAP_METHOD_ARB 0x2007
#define WGL_SUPPORT_OPENGL_ARB 0x2010
#define WGL_DOUBLE_BUFFER_ARB 0x2011
#define WGL_PIXEL_TYPE_ARB 0x2013
#define WGL_COLOR_BITS_ARB 0x2014
#define WGL_DEPTH_BITS_ARB 0x2022
#define WGL_STENCIL_BITS_ARB 0x2023
#define WGL_FULL_ACCELERATION_ARB 0x2027
#define WGL_SWAP_EXCHANGE_ARB 0x2028
#define WGL_TYPE_RGBA_ARB 0x202B
#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
#define WGL_CONTEXT_FLAGS_ARB 0x2094
#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
#define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
#define WGL_CONTEXT_FLAGS_ARB 0x2094
#define WGL_CONTEXT_DEBUG_BIT_ARB 0x0001
#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
#define ERROR_INVALID_VERSION_ARB 0x2095
#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATARBPROC) (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats,
int *piFormats, UINT *nNumFormats);
typedef HGLRC (WINAPI * PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC hDC, HGLRC hShareContext, const int *attribList);
typedef BOOL (WINAPI * PFNWGLSWAPINTERVALEXTPROC) (int interval);
PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB;
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT;
HDC ourWindowHandleToDeviceContext;
bool gl_init(void* hwnd, void* hdc)
{
if (ourWindowHandleToDeviceContext)
// Already initialized
return true;
PIXELFORMATDESCRIPTOR pfd =
{
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER, //Flags
PFD_TYPE_RGBA, //The kind of framebuffer. RGBA or palette.
32, //Colordepth of the framebuffer.
0, 0, 0, 0, 0, 0,
0,
0,
0,
0, 0, 0, 0,
24, //Number of bits for the depthbuffer
8, //Number of bits for the stencilbuffer
0, //Number of Aux buffers in the framebuffer.
PFD_MAIN_PLANE,
0,
0, 0, 0
};
/*HDC*/ ourWindowHandleToDeviceContext = (HDC)hdc;//GetDC((HWND)hwnd);
int letWindowsChooseThisPixelFormat;
letWindowsChooseThisPixelFormat = ChoosePixelFormat(ourWindowHandleToDeviceContext, &pfd);
SetPixelFormat(ourWindowHandleToDeviceContext,letWindowsChooseThisPixelFormat, &pfd);
HGLRC ourOpenGLRenderingContext = wglCreateContext(ourWindowHandleToDeviceContext);
wglMakeCurrent (ourWindowHandleToDeviceContext, ourOpenGLRenderingContext);
bool rv = true;
if (rv) {
wglChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB");
if(!wglChoosePixelFormatARB)
{
return false;
}
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress("wglCreateContextAttribsARB");
if(!wglCreateContextAttribsARB)
{
return false;
}
wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)wglGetProcAddress("wglSwapIntervalEXT");
if(!wglSwapIntervalEXT)
{
return false;
}
int attribs[] =
{
WGL_CONTEXT_MAJOR_VERSION_ARB, 4,
WGL_CONTEXT_MINOR_VERSION_ARB, 3,
WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
0
};
HGLRC m_hrc = wglCreateContextAttribsARB(ourWindowHandleToDeviceContext,0, attribs);
if (!m_hrc)
{
printf("Open GL 4.3 not supported\n");
// Try Gl 3.1
attribs[1] = 3;
attribs[3] = 1;
m_hrc = wglCreateContextAttribsARB(ourWindowHandleToDeviceContext,0, attribs);
}
if (m_hrc)
wglMakeCurrent(ourWindowHandleToDeviceContext,m_hrc);
else
rv = false;
wglDeleteContext(ourOpenGLRenderingContext);
}
if (rv) {
rv = gl3wInit() != -1 && gl3wIsSupported(3, 1);
}
RECT r;
GetClientRect((HWND)hwnd, &r);
screen_width = r.right - r.left;
screen_height = r.bottom - r.top;
return rv;
}
#include <Wingdi.h>
void gl_swap()
{
wglSwapLayerBuffers(ourWindowHandleToDeviceContext,WGL_SWAP_MAIN_PLANE);
//SwapBuffers(ourWindowHandleToDeviceContext);
}
#else
#if defined(SUPPORT_X11)
//! windows && X11
//let's assume glx for now
#include <X11/X.h>
#include <X11/Xlib.h>
#include <GL/gl.h>
#include <GL/glx.h>
bool gl_init(void* wind, void* disp)
{
extern void* x11_glc;
glXMakeCurrent((Display*)libPvr_GetRenderSurface(),
(GLXDrawable)libPvr_GetRenderTarget(),
(GLXContext)x11_glc);
screen_width = 640;
screen_height = 480;
return gl3wInit() != -1 && gl3wIsSupported(3, 1);
}
void gl_swap()
{
glXSwapBuffers((Display*)libPvr_GetRenderSurface(), (GLXDrawable)libPvr_GetRenderTarget());
Window win;
int temp;
unsigned int tempu, new_w, new_h;
XGetGeometry((Display*)libPvr_GetRenderSurface(), (GLXDrawable)libPvr_GetRenderTarget(),
&win, &temp, &temp, &new_w, &new_h,&tempu,&tempu);
//if resized, clear up the draw buffers, to avoid out-of-draw-area junk data
if (new_w != screen_width || new_h != screen_height) {
screen_width = new_w;
screen_height = new_h;
}
#if 0
//handy to debug really stupid render-not-working issues ...
glcache.ClearColor( 0, 0.5, 1, 1 );
glClear( GL_COLOR_BUFFER_BIT );
glXSwapBuffers((Display*)libPvr_GetRenderSurface(), (GLXDrawable)libPvr_GetRenderTarget());
glcache.ClearColor ( 1, 0.5, 0, 1 );
glClear ( GL_COLOR_BUFFER_BIT );
glXSwapBuffers((Display*)libPvr_GetRenderSurface(), (GLXDrawable)libPvr_GetRenderTarget());
#endif
}
#endif
#endif
#endif
#endif
void findGLVersion()
{
gl.index_type = GL_UNSIGNED_INT;
while (true)
if (glGetError() == GL_NO_ERROR)
break;
glGetIntegerv(GL_MAJOR_VERSION, &gl.gl_major);
if (glGetError() == GL_INVALID_ENUM)
gl.gl_major = 2;
const char *version = (const char *)glGetString(GL_VERSION);
printf("OpenGL version: %s\n", version);
if (!strncmp(version, "OpenGL ES", 9))
{
gl.is_gles = true;
if (gl.gl_major >= 3)
{
gl.gl_version = "GLES3";
gl.glsl_version_header = "#version 300 es";
}
else
{
gl.gl_version = "GLES2";
gl.glsl_version_header = "";
gl.index_type = GL_UNSIGNED_SHORT;
}
gl.fog_image_format = GL_ALPHA;
}
else
{
gl.is_gles = false;
if (gl.gl_major >= 3)
{
gl.gl_version = "GL3";
#if HOST_OS == OS_DARWIN
gl.glsl_version_header = "#version 150";
#else
gl.glsl_version_header = "#version 130";
#endif
gl.fog_image_format = GL_RED;
}
else
{
gl.gl_version = "GL2";
gl.glsl_version_header = "#version 120";
gl.fog_image_format = GL_ALPHA;
}
}
}
struct ShaderUniforms_t ShaderUniforms;
GLuint gl_CompileShader(const char* shader,GLuint type)
{
GLint result;
GLint compile_log_len;
GLuint rv=glCreateShader(type);
glShaderSource(rv, 1,&shader, NULL);
glCompileShader(rv);
//lets see if it compiled ...
glGetShaderiv(rv, GL_COMPILE_STATUS, &result);
glGetShaderiv(rv, GL_INFO_LOG_LENGTH, &compile_log_len);
if (!result && compile_log_len>0)
{
char* compile_log=(char*)malloc(compile_log_len);
*compile_log=0;
glGetShaderInfoLog(rv, compile_log_len, &compile_log_len, compile_log);
printf("Shader: %s \n%s\n",result?"compiled!":"failed to compile",compile_log);
free(compile_log);
}
return rv;
}
GLuint gl_CompileAndLink(const char* VertexShader, const char* FragmentShader)
{
//create shaders
GLuint vs=gl_CompileShader(VertexShader ,GL_VERTEX_SHADER);
GLuint ps=gl_CompileShader(FragmentShader ,GL_FRAGMENT_SHADER);
GLuint program = glCreateProgram();
glAttachShader(program, vs);
glAttachShader(program, ps);
//bind vertex attribute to vbo inputs
glBindAttribLocation(program, VERTEX_POS_ARRAY, "in_pos");
glBindAttribLocation(program, VERTEX_COL_BASE_ARRAY, "in_base");
glBindAttribLocation(program, VERTEX_COL_OFFS_ARRAY, "in_offs");
glBindAttribLocation(program, VERTEX_UV_ARRAY, "in_uv");
glBindAttribLocation(program, VERTEX_COL_BASE1_ARRAY, "in_base1");
glBindAttribLocation(program, VERTEX_COL_OFFS1_ARRAY, "in_offs1");
glBindAttribLocation(program, VERTEX_UV1_ARRAY, "in_uv1");
#ifndef GLES
glBindFragDataLocation(program, 0, "FragColor");
#endif
glLinkProgram(program);
GLint result;
glGetProgramiv(program, GL_LINK_STATUS, &result);
GLint compile_log_len;
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &compile_log_len);
if (!result && compile_log_len>0)
{
compile_log_len+= 1024;
char* compile_log=(char*)malloc(compile_log_len);
*compile_log=0;
glGetProgramInfoLog(program, compile_log_len, &compile_log_len, compile_log);
printf("Shader linking: %s \n (%d bytes), - %s -\n",result?"linked":"failed to link", compile_log_len,compile_log);
free(compile_log);
// Dump the shaders source for troubleshooting
printf("// VERTEX SHADER\n%s\n// END\n", VertexShader);
printf("// FRAGMENT SHADER\n%s\n// END\n", FragmentShader);
die("shader compile fail\n");
}
glDeleteShader(vs);
glDeleteShader(ps);
glcache.UseProgram(program);
verify(glIsProgram(program));
return program;
}
int GetProgramID(u32 cp_AlphaTest, u32 pp_ClipTestMode,
u32 pp_Texture, u32 pp_UseAlpha, u32 pp_IgnoreTexA, u32 pp_ShadInstr, u32 pp_Offset,
u32 pp_FogCtrl, bool pp_Gouraud, bool pp_BumpMap, bool fog_clamping, bool trilinear)
{
u32 rv=0;
rv|=pp_ClipTestMode;
rv<<=1; rv|=cp_AlphaTest;
rv<<=1; rv|=pp_Texture;
rv<<=1; rv|=pp_UseAlpha;
rv<<=1; rv|=pp_IgnoreTexA;
rv<<=2; rv|=pp_ShadInstr;
rv<<=1; rv|=pp_Offset;
rv<<=2; rv|=pp_FogCtrl;
rv<<=1; rv|=pp_Gouraud;
rv<<=1; rv|=pp_BumpMap;
rv<<=1; rv|=fog_clamping;
rv<<=1; rv|=trilinear;
return rv;
}
bool CompilePipelineShader( PipelineShader* s)
{
char vshader[8192];
sprintf(vshader, VertexShaderSource, gl.glsl_version_header, gl.gl_version, s->pp_Gouraud);
char pshader[8192];
sprintf(pshader,PixelPipelineShader, gl.glsl_version_header, gl.gl_version,
s->cp_AlphaTest,s->pp_ClipTestMode,s->pp_UseAlpha,
s->pp_Texture,s->pp_IgnoreTexA,s->pp_ShadInstr,s->pp_Offset,s->pp_FogCtrl, s->pp_Gouraud, s->pp_BumpMap,
s->fog_clamping, s->trilinear);
s->program=gl_CompileAndLink(vshader, pshader);
//setup texture 0 as the input for the shader
GLuint gu=glGetUniformLocation(s->program, "tex");
if (s->pp_Texture==1)
glUniform1i(gu,0);
//get the uniform locations
s->scale = glGetUniformLocation(s->program, "scale");
s->depth_scale = glGetUniformLocation(s->program, "depth_scale");
s->extra_depth_scale = glGetUniformLocation(s->program, "extra_depth_scale");
s->pp_ClipTest = glGetUniformLocation(s->program, "pp_ClipTest");
s->sp_FOG_DENSITY = glGetUniformLocation(s->program, "sp_FOG_DENSITY");
s->cp_AlphaTestValue= glGetUniformLocation(s->program, "cp_AlphaTestValue");
//FOG_COL_RAM,FOG_COL_VERT,FOG_DENSITY;
if (s->pp_FogCtrl==1 && s->pp_Texture==1)
s->sp_FOG_COL_VERT=glGetUniformLocation(s->program, "sp_FOG_COL_VERT");
else
s->sp_FOG_COL_VERT=-1;
if (s->pp_FogCtrl==0 || s->pp_FogCtrl==3)
{
s->sp_FOG_COL_RAM=glGetUniformLocation(s->program, "sp_FOG_COL_RAM");
}
else
{
s->sp_FOG_COL_RAM=-1;
}
// Setup texture 1 as the fog table
gu = glGetUniformLocation(s->program, "fog_table");
if (gu != -1)
glUniform1i(gu, 1);
s->trilinear_alpha = glGetUniformLocation(s->program, "trilinear_alpha");
if (s->fog_clamping)
{
s->fog_clamp_min = glGetUniformLocation(s->program, "fog_clamp_min");
s->fog_clamp_max = glGetUniformLocation(s->program, "fog_clamp_max");
}
else
{
s->fog_clamp_min = -1;
s->fog_clamp_max = -1;
}
ShaderUniforms.Set(s);
return glIsProgram(s->program)==GL_TRUE;
}
GLuint osd_tex;
GLuint osd_font;
void gl_load_osd_resources()
{
int w, h;
if (osd_tex == 0)
osd_tex = loadPNG(get_readonly_data_path("/data/buttons.png"), w, h);
if (osd_font == 0)
{
#ifdef TARGET_PANDORA
osd_font = loadPNG(get_readonly_data_path("/font2.png"), w, h);
#else
osd_font = loadPNG(get_readonly_data_path("/pixmaps/font.png"), w, h);
if (osd_font == 0)
osd_font = loadPNG(get_readonly_data_path("/font.png"), w, h);
#endif
}
}
bool gl_create_resources()
{
if (gl.vbo.geometry != 0)
// Assume the resources have already been created
return true;
#ifndef GLES
//create vao
//This is really not "proper", vaos are supposed to be defined once
//i keep updating the same one to make the es2 code work in 3.1 context
glGenVertexArrays(1, &gl.vbo.vao);
#endif
//create vbos
glGenBuffers(1, &gl.vbo.geometry);
glGenBuffers(1, &gl.vbo.modvols);
glGenBuffers(1, &gl.vbo.idxs);
glGenBuffers(1, &gl.vbo.idxs2);
memset(gl.pogram_table,0,sizeof(gl.pogram_table));
PipelineShader* dshader=0;
u32 compile=0;
#define forl(name,max) for(u32 name=0;name<=max;name++)
forl(cp_AlphaTest,1)
{
forl(pp_ClipTestMode,2)
{
forl(pp_UseAlpha,1)
{
forl(pp_Texture,1)
{
forl(pp_FogCtrl,3)
{
forl(pp_IgnoreTexA,1)
{
forl(pp_ShadInstr,3)
{
forl(pp_Offset,1)
{
forl(pp_Gouraud,1)
{
forl(pp_BumpMap,1)
{
forl(fog_clamping,1)
{
forl(trilinear,1)
{
dshader=&gl.pogram_table[GetProgramID(cp_AlphaTest,pp_ClipTestMode,pp_Texture,pp_UseAlpha,pp_IgnoreTexA,
pp_ShadInstr,pp_Offset,pp_FogCtrl, (bool)pp_Gouraud, (bool)pp_BumpMap, (bool)fog_clamping,
(bool)trilinear)];
dshader->cp_AlphaTest = cp_AlphaTest;
dshader->pp_ClipTestMode = pp_ClipTestMode-1;
dshader->pp_Texture = pp_Texture;
dshader->pp_UseAlpha = pp_UseAlpha;
dshader->pp_IgnoreTexA = pp_IgnoreTexA;
dshader->pp_ShadInstr = pp_ShadInstr;
dshader->pp_Offset = pp_Offset;
dshader->pp_FogCtrl = pp_FogCtrl;
dshader->pp_Gouraud = pp_Gouraud;
dshader->pp_BumpMap = pp_BumpMap;
dshader->fog_clamping = fog_clamping;
dshader->trilinear = trilinear;
dshader->program = -1;
}
}
}
}
}
}
}
}
}
}
}
}
findGLVersion();
char vshader[8192];
sprintf(vshader, VertexShaderSource, gl.glsl_version_header, gl.gl_version, 1);
char fshader[8192];
sprintf(fshader, ModifierVolumeShader, gl.glsl_version_header, gl.gl_version);
gl.modvol_shader.program=gl_CompileAndLink(vshader, fshader);
gl.modvol_shader.scale = glGetUniformLocation(gl.modvol_shader.program, "scale");
gl.modvol_shader.sp_ShaderColor = glGetUniformLocation(gl.modvol_shader.program, "sp_ShaderColor");
gl.modvol_shader.depth_scale = glGetUniformLocation(gl.modvol_shader.program, "depth_scale");
gl.modvol_shader.extra_depth_scale = glGetUniformLocation(gl.modvol_shader.program, "extra_depth_scale");
sprintf(fshader, OSD_Shader, gl.glsl_version_header, gl.gl_version);
gl.OSD_SHADER.program=gl_CompileAndLink(vshader, fshader);
printf("OSD: %d\n",gl.OSD_SHADER.program);
gl.OSD_SHADER.scale=glGetUniformLocation(gl.OSD_SHADER.program, "scale");
gl.OSD_SHADER.depth_scale=glGetUniformLocation(gl.OSD_SHADER.program, "depth_scale");
gl.OSD_SHADER.extra_depth_scale = glGetUniformLocation(gl.OSD_SHADER.program, "extra_depth_scale");
glUniform1i(glGetUniformLocation(gl.OSD_SHADER.program, "tex"),0); //bind osd texture to slot 0
//#define PRECOMPILE_SHADERS
#ifdef PRECOMPILE_SHADERS
for (u32 i=0;i<sizeof(gl.pogram_table)/sizeof(gl.pogram_table[0]);i++)
{
if (!CompilePipelineShader( &gl.pogram_table[i] ))
return false;
}
#endif
gl_load_osd_resources();
gui_init();
return true;
}
//swap buffers
void gl_swap();
//destroy the gles context and free resources
void gl_term();
GLuint gl_CompileShader(const char* shader,GLuint type);
bool gl_create_resources();
//setup
bool gles_init()
{
if (!gl_init((void*)libPvr_GetRenderTarget(),
(void*)libPvr_GetRenderSurface()))
return false;
glcache.EnableCache();
if (!gl_create_resources())
return false;
#if defined(GLES) && HOST_OS != OS_DARWIN && !defined(TARGET_NACL32)
#ifdef TARGET_PANDORA
fbdev=open("/dev/fb0", O_RDONLY);
#else
eglSwapInterval(gl.setup.display,1);
#endif
#endif
// glEnable(GL_DEBUG_OUTPUT);
// glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
// glDebugMessageCallback(gl_DebugOutput, NULL);
// glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, NULL, GL_TRUE);
//clean up the buffer
glcache.ClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT);
gl_swap();
#ifdef GLES
glHint(GL_GENERATE_MIPMAP_HINT, GL_FASTEST);
#endif
if (settings.rend.TextureUpscale > 1)
{
// Trick to preload the tables used by xBRZ
u32 src[] { 0x11111111, 0x22222222, 0x33333333, 0x44444444 };
u32 dst[16];
UpscalexBRZ(2, src, dst, 2, 2, false);
}
fog_needs_update = true;
return true;
}
void UpdateFogTexture(u8 *fog_table, GLenum texture_slot, GLint fog_image_format)
{
glActiveTexture(texture_slot);
if (fogTextureId == 0)
{
fogTextureId = glcache.GenTexture();
glcache.BindTexture(GL_TEXTURE_2D, fogTextureId);
glcache.TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glcache.TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glcache.TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glcache.TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
else
glcache.BindTexture(GL_TEXTURE_2D, fogTextureId);
u8 temp_tex_buffer[256];
for (int i = 0; i < 128; i++)
{
temp_tex_buffer[i] = fog_table[i * 4];
temp_tex_buffer[i + 128] = fog_table[i * 4 + 1];
}
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, fog_image_format, 128, 2, 0, fog_image_format, GL_UNSIGNED_BYTE, temp_tex_buffer);
glCheck();
glActiveTexture(GL_TEXTURE0);
}
extern u16 kcode[4];
extern u8 rt[4],lt[4];
#define key_CONT_C (1 << 0)
#define key_CONT_B (1 << 1)
#define key_CONT_A (1 << 2)
#define key_CONT_START (1 << 3)
#define key_CONT_DPAD_UP (1 << 4)
#define key_CONT_DPAD_DOWN (1 << 5)
#define key_CONT_DPAD_LEFT (1 << 6)
#define key_CONT_DPAD_RIGHT (1 << 7)
#define key_CONT_Z (1 << 8)
#define key_CONT_Y (1 << 9)
#define key_CONT_X (1 << 10)
#define key_CONT_D (1 << 11)
#define key_CONT_DPAD2_UP (1 << 12)
#define key_CONT_DPAD2_DOWN (1 << 13)
#define key_CONT_DPAD2_LEFT (1 << 14)
#define key_CONT_DPAD2_RIGHT (1 << 15)
u32 osd_base;
u32 osd_count;
#if defined(_ANDROID)
extern float vjoy_pos[14][8];
#else
float vjoy_pos[14][8]=
{
{24+0,24+64,64,64}, //LEFT
{24+64,24+0,64,64}, //UP
{24+128,24+64,64,64}, //RIGHT
{24+64,24+128,64,64}, //DOWN
{440+0,280+64,64,64}, //X
{440+64,280+0,64,64}, //Y
{440+128,280+64,64,64}, //B
{440+64,280+128,64,64}, //A
{320-32,360+32,64,64}, //Start
{440,200,90,64}, //RT
{542,200,90,64}, //LT
{-24,128+224,128,128}, //ANALOG_RING
{96,320,64,64}, //ANALOG_POINT
{1}
};
#endif // !_ANDROID
float vjoy_sz[2][14] = {
{ 64,64,64,64, 64,64,64,64, 64, 90,90, 128, 64 },
{ 64,64,64,64, 64,64,64,64, 64, 64,64, 128, 64 },
};
void HideOSD()
{
vjoy_pos[13][0] = 0;
vjoy_pos[13][1] = 0;
vjoy_pos[13][2] = 0;
vjoy_pos[13][3] = 0;
}
static void DrawButton(float* xy, u32 state)
{
Vertex vtx;
vtx.z=1;
float x = xy[0] * scale_x;
float y = xy[1] * scale_y;
float w = xy[2] * scale_x;
float h = xy[3] * scale_y;
vtx.col[0]=vtx.col[1]=vtx.col[2]=(0x7F-0x40*state/255)*vjoy_pos[13][0];
vtx.col[3]=0xA0*vjoy_pos[13][4];
vjoy_pos[13][4]+=(vjoy_pos[13][0]-vjoy_pos[13][4])/2;
vtx.x=x; vtx.y=y;
vtx.u=xy[4]; vtx.v=xy[5];
*pvrrc.verts.Append()=vtx;
vtx.x=x+w; vtx.y=y;
vtx.u=xy[6]; vtx.v=xy[5];
*pvrrc.verts.Append()=vtx;
vtx.x=x; vtx.y=y+h;
vtx.u=xy[4]; vtx.v=xy[7];
*pvrrc.verts.Append()=vtx;
vtx.x=x+w; vtx.y=y+h;
vtx.u=xy[6]; vtx.v=xy[7];
*pvrrc.verts.Append()=vtx;
osd_count+=4;
}
static void ClearBG()
{
}
void DrawButton2(float* xy, bool state) { DrawButton(xy,state?0:255); }
static void DrawCenteredText(float yy, float scale, int transparency, const char* text)
// Draw a centered text. Font is loaded from font2.png file. Each char is 16*16 size, so scale it down so it's not too big
// Transparency 255=opaque, 0=not visible
{
Vertex vtx;
vtx.z=1;
float w=float(strlen(text)*14)*scale;
float x=320-w/2.0f;
float y=yy;
float h=16.0f*scale;
w=14.0f*scale;
float step=32.0f/512.0f;
float step2=4.0f/512.0f;
if (transparency<0) transparency=0;
if (transparency>255) transparency=255;
for (int i=0; i<strlen(text); i++) {
int c=text[i];
float u=float(c%16);
float v=float(c/16);
vtx.col[0]=vtx.col[1]=vtx.col[2]=255;
vtx.col[3]=transparency;
vtx.x=x; vtx.y=y;
vtx.u=u*step+step2; vtx.v=v*step+step2;
*pvrrc.verts.Append()=vtx;
vtx.x=x+w; vtx.y=y;
vtx.u=u*step+step-step2; vtx.v=v*step+step2;
*pvrrc.verts.Append()=vtx;
vtx.x=x; vtx.y=y+h;
vtx.u=u*step+step2; vtx.v=v*step+step-step2;
*pvrrc.verts.Append()=vtx;
vtx.x=x+w; vtx.y=y+h;
vtx.u=u*step+step-step2; vtx.v=v*step+step-step2;
*pvrrc.verts.Append()=vtx;
x+=w;
osd_count+=4;
}
}
static void DrawRightedText(float yy, float scale, int transparency, const char* text)
// Draw a text right justified. Font is loaded from font.png file. Each char is 16*16 size, so scale it down so it's not too big
// Transparency 255=opaque, 0=not visible
{
Vertex vtx;
vtx.z=1;
float w = float(strlen(text) * 14) * scale * scale_x;
float x = scale_x / 2 * (640 + screen_width * 480 / screen_height) - w;
float y = yy * scale_y;
float h = 16.0f * scale * scale_y;
w = 14.0f * scale * scale_x;
float step=32.0f/512.0f;
float step2=4.0f/512.0f;
if (transparency<0) transparency=0;
if (transparency>255) transparency=255;
for (int i=0; i<strlen(text); i++) {
int c=text[i];
float u=float(c%16);
float v=float(c/16);
vtx.col[0]=vtx.col[1]=vtx.col[2]=255;
vtx.col[3]=transparency;
vtx.x=x; vtx.y=y;
vtx.u=u*step+step2; vtx.v=v*step+step2;
*pvrrc.verts.Append()=vtx;
vtx.x=x+w; vtx.y=y;
vtx.u=u*step+step-step2; vtx.v=v*step+step2;
*pvrrc.verts.Append()=vtx;
vtx.x=x; vtx.y=y+h;
vtx.u=u*step+step2; vtx.v=v*step+step-step2;
*pvrrc.verts.Append()=vtx;
vtx.x=x+w; vtx.y=y+h;
vtx.u=u*step+step-step2; vtx.v=v*step+step-step2;
*pvrrc.verts.Append()=vtx;
x+=w;
osd_count+=4;
}
}
#ifdef TARGET_PANDORA
char OSD_Info[128];
int OSD_Delay=0;
char OSD_Counters[256];
int OSD_Counter=0;
#endif
static float LastFPSTime;
static int lastFrameCount = 0;
static float fps = -1;
void OSD_HOOK()
{
osd_base=pvrrc.verts.used();
osd_count=0;
#ifndef TARGET_PANDORA
if (osd_tex)
{
DrawButton2(vjoy_pos[0],kcode[0]&key_CONT_DPAD_LEFT);
DrawButton2(vjoy_pos[1],kcode[0]&key_CONT_DPAD_UP);
DrawButton2(vjoy_pos[2],kcode[0]&key_CONT_DPAD_RIGHT);
DrawButton2(vjoy_pos[3],kcode[0]&key_CONT_DPAD_DOWN);
DrawButton2(vjoy_pos[4],kcode[0]&key_CONT_X);
DrawButton2(vjoy_pos[5],kcode[0]&key_CONT_Y);
DrawButton2(vjoy_pos[6],kcode[0]&key_CONT_B);
DrawButton2(vjoy_pos[7],kcode[0]&key_CONT_A);
DrawButton2(vjoy_pos[8],kcode[0]&key_CONT_START);
DrawButton(vjoy_pos[9],lt[0]);
DrawButton(vjoy_pos[10],rt[0]);
DrawButton2(vjoy_pos[11],1);
DrawButton2(vjoy_pos[12],0);
}
#endif
#ifdef TARGET_PANDORA
if (OSD_Delay) {
DrawCenteredText(400, 1.0f, (OSD_Delay<255)?OSD_Delay:255, OSD_Info);
OSD_Delay--; //*TODO* Delay should be in ms, not in ticks...
}
if (OSD_Counter) {
DrawRightedText(20, 1.0f, 255, OSD_Counters);
}
#endif
if (settings.rend.ShowFPS && osd_font) {
if (os_GetSeconds() - LastFPSTime > 0.5) {
fps = (FrameCount - lastFrameCount) / (os_GetSeconds() - LastFPSTime);
LastFPSTime = os_GetSeconds();
lastFrameCount = FrameCount;
}
if (fps >= 0) {
char text[32];
sprintf(text, "F:%.1f", fps);
DrawRightedText(460, 1.f, 196, text);
}
}
}
#define OSD_TEX_W 512
#define OSD_TEX_H 256
void OSD_DRAW(GLuint shader_program)
{
#ifndef TARGET_PANDORA
if (osd_tex)
{
float u=0;
float v=0;
for (int i=0;i<13;i++)
{
//umin,vmin,umax,vmax
vjoy_pos[i][4]=(u+1)/OSD_TEX_W;
vjoy_pos[i][5]=(v+1)/OSD_TEX_H;
vjoy_pos[i][6]=((u+vjoy_sz[0][i]-1))/OSD_TEX_W;
vjoy_pos[i][7]=((v+vjoy_sz[1][i]-1))/OSD_TEX_H;
u+=vjoy_sz[0][i];
if (u>=OSD_TEX_W)
{
u-=OSD_TEX_W;
v+=vjoy_sz[1][i];
}
//v+=vjoy_pos[i][3];
}
verify(glIsProgram(shader_program));
glcache.BindTexture(GL_TEXTURE_2D, osd_tex);
glcache.UseProgram(shader_program);
//reset rendering scale
/*
float dc_width=640;
float dc_height=480;
float dc2s_scale_h=screen_height/480.0f;
float ds2s_offs_x=(screen_width-dc2s_scale_h*640)/2;
//-1 -> too much to left
ShaderUniforms.scale_coefs[0]=2.0f/(screen_width/dc2s_scale_h);
ShaderUniforms.scale_coefs[1]=-2/dc_height;
ShaderUniforms.scale_coefs[2]=1-2*ds2s_offs_x/(screen_width);
ShaderUniforms.scale_coefs[3]=-1;
glUniform4fv( gl.OSD_SHADER.scale, 1, ShaderUniforms.scale_coefs);
*/
glcache.Enable(GL_BLEND);
glcache.Disable(GL_DEPTH_TEST);
glcache.BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glcache.DepthMask(false);
glcache.DepthFunc(GL_ALWAYS);
glcache.Disable(GL_CULL_FACE);
glcache.Disable(GL_SCISSOR_TEST);
int dfa=osd_count/4;
for (int i=0;i<dfa;i++)
glDrawArrays(GL_TRIANGLE_STRIP,osd_base+i*4,4);
}
#endif
if (osd_font)
{
float u=0;
float v=0;
verify(glIsProgram(shader_program));
float dc_width=640;
float dc_height=480;
float dc2s_scale_h=screen_height/480.0f;
float ds2s_offs_x=(screen_width-dc2s_scale_h*640)/2;
glcache.BindTexture(GL_TEXTURE_2D,osd_font);
glcache.UseProgram(shader_program);
glcache.Enable(GL_BLEND);
glcache.Disable(GL_DEPTH_TEST);
glcache.BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glcache.DepthMask(false);
glcache.DepthFunc(GL_ALWAYS);
glcache.Disable(GL_CULL_FACE);
glcache.Disable(GL_SCISSOR_TEST);
int dfa=osd_count/4;
for (int i=0;i<dfa;i++)
glDrawArrays(GL_TRIANGLE_STRIP,osd_base+i*4,4);
}
}
bool ProcessFrame(TA_context* ctx)
{
ctx->rend_inuse.Lock();
if (KillTex)
{
void killtex();
killtex();
printf("Texture cache cleared\n");
}
if (ctx->rend.isRenderFramebuffer)
{
RenderFramebuffer();
ctx->rend_inuse.Unlock();
}
else
{
if (!ta_parse_vdrc(ctx))
return false;
}
CollectCleanup();
if (ctx->rend.Overrun)
printf("ERROR: TA context overrun\n");
return !ctx->rend.Overrun;
}
static void upload_vertex_indices()
{
if (gl.index_type == GL_UNSIGNED_SHORT)
{
static bool overrun;
static List<u16> short_idx;
if (short_idx.daty != NULL)
short_idx.Free();
short_idx.Init(pvrrc.idx.used(), &overrun, NULL);
for (u32 *p = pvrrc.idx.head(); p < pvrrc.idx.LastPtr(0); p++)
*(short_idx.Append()) = *p;
glBufferData(GL_ELEMENT_ARRAY_BUFFER, short_idx.bytes(), short_idx.head(), GL_STREAM_DRAW);
}
else
glBufferData(GL_ELEMENT_ARRAY_BUFFER,pvrrc.idx.bytes(),pvrrc.idx.head(),GL_STREAM_DRAW);
glCheck();
}
bool RenderFrame()
{
DoCleanup();
bool is_rtt=pvrrc.isRTT;
if (!is_rtt)
OSD_HOOK();
//if (FrameCount&7) return;
//Setup the matrix
//TODO: Make this dynamic
float vtx_min_fZ=0.f; //pvrrc.fZ_min;
float vtx_max_fZ=pvrrc.fZ_max;
//sanitise the values, now with NaN detection (for omap)
//0x49800000 is 1024*1024. Using integer math to avoid issues w/ infs and nans
if ((s32&)vtx_max_fZ<0 || (u32&)vtx_max_fZ>0x49800000)
vtx_max_fZ=10*1024;
//add some extra range to avoid clipping border cases
vtx_min_fZ*=0.98f;
vtx_max_fZ*=1.001f;
//calculate a projection so that it matches the pvr x,y setup, and
//a) Z is linearly scaled between 0 ... 1
//b) W is passed though for proper perspective calculations
/*
PowerVR coords:
fx, fy (pixel coordinates)
fz=1/w
(as a note, fx=x*fz;fy=y*fz)
Clip space
-Wc .. Wc, xyz
x: left-right, y: bottom-top
NDC space
-1 .. 1, xyz
Window space:
translated NDC (viewport, glDepth)
Attributes:
//this needs to be cleared up, been some time since I wrote my rasteriser and i'm starting
//to forget/mixup stuff
vaX -> VS output
iaX=vaX*W -> value to be interpolated
iaX',W' -> interpolated values
paX=iaX'/W' -> Per pixel interpolated value for attribute
Proper mappings:
Output from shader:
W=1/fz
x=fx*W -> maps to fx after perspective divide
y=fy*W -> fy -//-
z=-W for min, W for max. Needs to be linear.
umodified W, perfect mapping:
Z mapping:
pz=z/W
pz=z/(1/fz)
pz=z*fz
z=zt_s+zt_o
pz=(zt_s+zt_o)*fz
pz=zt_s*fz+zt_o*fz
zt_s=scale
zt_s=2/(max_fz-min_fz)
zt_o*fz=-min_fz-1
zt_o=(-min_fz-1)/fz == (-min_fz-1)*W
x=fx/(fx_range/2)-1 //0 to max -> -1 to 1
y=fy/(-fy_range/2)+1 //0 to max -> 1 to -1
z=-min_fz*W + (zt_s-1) //0 to +inf -> -1 to 1
o=a*z+c
1=a*z_max+c
-1=a*z_min+c
c=-a*z_min-1
1=a*z_max-a*z_min-1
2=a*(z_max-z_min)
a=2/(z_max-z_min)
*/
//float B=2/(min_invW-max_invW);
//float A=-B*max_invW+vnear;
//these should be adjusted based on the current PVR scaling etc params
float dc_width=640;
float dc_height=480;
if (!is_rtt)
{
gcflip=0;
}
else
{
gcflip=1;
//For some reason this produces wrong results
//so for now its hacked based like on the d3d code
/*
u32 pvr_stride=(FB_W_LINESTRIDE.stride)*8;
*/
dc_width = pvrrc.fb_X_CLIP.max - pvrrc.fb_X_CLIP.min + 1;
dc_height = pvrrc.fb_Y_CLIP.max - pvrrc.fb_Y_CLIP.min + 1;
}
scale_x = 1;
scale_y = 1;
float scissoring_scale_x = 1;
if (!is_rtt && !pvrrc.isRenderFramebuffer)
{
scale_x=fb_scale_x;
scale_y=fb_scale_y;
//work out scaling parameters !
//Pixel doubling is on VO, so it does not affect any pixel operations
//A second scaling is used here for scissoring
if (VO_CONTROL.pixel_double)
{
scissoring_scale_x = 0.5f;
scale_x *= 0.5f;
}
if (SCALER_CTL.hscale)
{
scissoring_scale_x /= 2;
scale_x*=2;
}
}
dc_width *= scale_x;
dc_height *= scale_y;
/*
float vnear=0;
float vfar =1;
float max_invW=1/vtx_min_fZ;
float min_invW=1/vtx_max_fZ;
float B=vfar/(min_invW-max_invW);
float A=-B*max_invW+vnear;
GLfloat dmatrix[16] =
{
(2.f/dc_width) ,0 ,-(640/dc_width) ,0 ,
0 ,-(2.f/dc_height) ,(480/dc_height) ,0 ,
0 ,0 ,A ,B ,
0 ,0 ,1 ,0
};
glUniformMatrix4fv(gl.matrix, 1, GL_FALSE, dmatrix);
*/
/*
Handle Dc to screen scaling
*/
float dc2s_scale_h = is_rtt ? (screen_width / dc_width) : (screen_height / 480.0);
float ds2s_offs_x = is_rtt ? 0 : ((screen_width - dc2s_scale_h * 640.0) / 2);
//-1 -> too much to left
ShaderUniforms.scale_coefs[0]=2.0f/(screen_width/dc2s_scale_h*scale_x);
ShaderUniforms.scale_coefs[1]=(is_rtt ? 2 : -2) / dc_height; // FIXME CT2 needs 480 here instead of dc_height=512
ShaderUniforms.scale_coefs[2]=1-2*ds2s_offs_x/(screen_width);
ShaderUniforms.scale_coefs[3]=(is_rtt?1:-1);
ShaderUniforms.depth_coefs[0]=2/(vtx_max_fZ-vtx_min_fZ);
ShaderUniforms.depth_coefs[1]=-vtx_min_fZ-1;
ShaderUniforms.depth_coefs[2]=0;
ShaderUniforms.depth_coefs[3]=0;
ShaderUniforms.extra_depth_scale = settings.rend.ExtraDepthScale;
//printf("scale: %f, %f, %f, %f\n",ShaderUniforms.scale_coefs[0],ShaderUniforms.scale_coefs[1],ShaderUniforms.scale_coefs[2],ShaderUniforms.scale_coefs[3]);
//VERT and RAM fog color constants
u8* fog_colvert_bgra=(u8*)&FOG_COL_VERT;
u8* fog_colram_bgra=(u8*)&FOG_COL_RAM;
ShaderUniforms.ps_FOG_COL_VERT[0]=fog_colvert_bgra[2]/255.0f;
ShaderUniforms.ps_FOG_COL_VERT[1]=fog_colvert_bgra[1]/255.0f;
ShaderUniforms.ps_FOG_COL_VERT[2]=fog_colvert_bgra[0]/255.0f;
ShaderUniforms.ps_FOG_COL_RAM[0]=fog_colram_bgra [2]/255.0f;
ShaderUniforms.ps_FOG_COL_RAM[1]=fog_colram_bgra [1]/255.0f;
ShaderUniforms.ps_FOG_COL_RAM[2]=fog_colram_bgra [0]/255.0f;
//Fog density constant
u8* fog_density=(u8*)&FOG_DENSITY;
float fog_den_mant=fog_density[1]/128.0f; //bit 7 -> x. bit, so [6:0] -> fraction -> /128
s32 fog_den_exp=(s8)fog_density[0];
ShaderUniforms.fog_den_float=fog_den_mant*powf(2.0f,fog_den_exp);
ShaderUniforms.fog_clamp_min[0] = ((pvrrc.fog_clamp_min >> 16) & 0xFF) / 255.0f;
ShaderUniforms.fog_clamp_min[1] = ((pvrrc.fog_clamp_min >> 8) & 0xFF) / 255.0f;
ShaderUniforms.fog_clamp_min[2] = ((pvrrc.fog_clamp_min >> 0) & 0xFF) / 255.0f;
ShaderUniforms.fog_clamp_min[3] = ((pvrrc.fog_clamp_min >> 24) & 0xFF) / 255.0f;
ShaderUniforms.fog_clamp_max[0] = ((pvrrc.fog_clamp_max >> 16) & 0xFF) / 255.0f;
ShaderUniforms.fog_clamp_max[1] = ((pvrrc.fog_clamp_max >> 8) & 0xFF) / 255.0f;
ShaderUniforms.fog_clamp_max[2] = ((pvrrc.fog_clamp_max >> 0) & 0xFF) / 255.0f;
ShaderUniforms.fog_clamp_max[3] = ((pvrrc.fog_clamp_max >> 24) & 0xFF) / 255.0f;
if (fog_needs_update)
{
fog_needs_update = false;
UpdateFogTexture((u8 *)FOG_TABLE, GL_TEXTURE1, gl.fog_image_format);
}
glcache.UseProgram(gl.modvol_shader.program);
glUniform4fv( gl.modvol_shader.scale, 1, ShaderUniforms.scale_coefs);
glUniform4fv( gl.modvol_shader.depth_scale, 1, ShaderUniforms.depth_coefs);
glUniform1f(gl.modvol_shader.extra_depth_scale, ShaderUniforms.extra_depth_scale);
GLfloat td[4]={0.5,0,0,0};
glcache.UseProgram(gl.OSD_SHADER.program);
glUniform4fv( gl.OSD_SHADER.scale, 1, ShaderUniforms.scale_coefs);
glUniform4fv( gl.OSD_SHADER.depth_scale, 1, td);
glUniform1f(gl.OSD_SHADER.extra_depth_scale, 1.0f);
ShaderUniforms.PT_ALPHA=(PT_ALPHA_REF&0xFF)/255.0f;
// for (u32 i=0;i<sizeof(gl.pogram_table)/sizeof(gl.pogram_table[0]);i++)
// {
// PipelineShader* s=&gl.pogram_table[i];
// if (s->program == -1)
// continue;
//
// glcache.UseProgram(s->program);
//
// ShaderUniforms.Set(s);
// }
//setup render target first
if (is_rtt)
{
GLuint channels,format;
switch(FB_W_CTRL.fb_packmode)
{
case 0: //0x0 0555 KRGB 16 bit (default) Bit 15 is the value of fb_kval[7].
channels=GL_RGBA;
format=GL_UNSIGNED_BYTE;
break;
case 1: //0x1 565 RGB 16 bit
channels=GL_RGB;
format=GL_UNSIGNED_SHORT_5_6_5;
break;
case 2: //0x2 4444 ARGB 16 bit
channels=GL_RGBA;
format=GL_UNSIGNED_BYTE;
break;
case 3://0x3 1555 ARGB 16 bit The alpha value is determined by comparison with the value of fb_alpha_threshold.
channels=GL_RGBA;
format=GL_UNSIGNED_BYTE;
break;
case 4: //0x4 888 RGB 24 bit packed
case 5: //0x5 0888 KRGB 32 bit K is the value of fk_kval.
case 6: //0x6 8888 ARGB 32 bit
fprintf(stderr, "Unsupported render to texture format: %d\n", FB_W_CTRL.fb_packmode);
return false;
case 7: //7 invalid
die("7 is not valid");
break;
}
//printf("RTT packmode=%d stride=%d - %d,%d -> %d,%d\n", FB_W_CTRL.fb_packmode, FB_W_LINESTRIDE.stride * 8,
// FB_X_CLIP.min, FB_Y_CLIP.min, FB_X_CLIP.max, FB_Y_CLIP.max);
BindRTT(FB_W_SOF1 & VRAM_MASK, dc_width, dc_height, channels, format);
}
else
{
#if HOST_OS != OS_DARWIN
//Fix this in a proper way
glBindFramebuffer(GL_FRAMEBUFFER,0);
#endif
glViewport(0, 0, screen_width, screen_height);
}
bool wide_screen_on = !is_rtt && settings.rend.WideScreen
&& pvrrc.fb_X_CLIP.min == 0
&& (pvrrc.fb_X_CLIP.max + 1) / scale_x == 640
&& pvrrc.fb_Y_CLIP.min == 0
&& (pvrrc.fb_Y_CLIP.max + 1) / scale_y == 480;
//Color is cleared by the background plane
glcache.Disable(GL_SCISSOR_TEST);
glcache.DepthMask(GL_TRUE);
glClearDepthf(0.0);
glStencilMask(0xFF); glCheck();
glClearStencil(0);
glClear(GL_STENCIL_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glCheck();
//move vertex to gpu
if (!pvrrc.isRenderFramebuffer)
{
//Main VBO
glBindBuffer(GL_ARRAY_BUFFER, gl.vbo.geometry); glCheck();
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, gl.vbo.idxs); glCheck();
glBufferData(GL_ARRAY_BUFFER,pvrrc.verts.bytes(),pvrrc.verts.head(),GL_STREAM_DRAW); glCheck();
upload_vertex_indices();
//Modvol VBO
if (pvrrc.modtrig.used())
{
glBindBuffer(GL_ARRAY_BUFFER, gl.vbo.modvols); glCheck();
glBufferData(GL_ARRAY_BUFFER,pvrrc.modtrig.bytes(),pvrrc.modtrig.head(),GL_STREAM_DRAW); glCheck();
}
int offs_x=ds2s_offs_x+0.5f;
//this needs to be scaled
//not all scaling affects pixel operations, scale to adjust for that
scale_x *= scissoring_scale_x;
#if 0
//handy to debug really stupid render-not-working issues ...
printf("SS: %dx%d\n", screen_width, screen_height);
printf("SCI: %d, %f\n", pvrrc.fb_X_CLIP.max, dc2s_scale_h);
printf("SCI: %f, %f, %f, %f\n", offs_x+pvrrc.fb_X_CLIP.min/scale_x,(pvrrc.fb_Y_CLIP.min/scale_y)*dc2s_scale_h,(pvrrc.fb_X_CLIP.max-pvrrc.fb_X_CLIP.min+1)/scale_x*dc2s_scale_h,(pvrrc.fb_Y_CLIP.max-pvrrc.fb_Y_CLIP.min+1)/scale_y*dc2s_scale_h);
#endif
if (!wide_screen_on)
{
float width = (pvrrc.fb_X_CLIP.max - pvrrc.fb_X_CLIP.min + 1) / scale_x;
float height = (pvrrc.fb_Y_CLIP.max - pvrrc.fb_Y_CLIP.min + 1) / scale_y;
float min_x = pvrrc.fb_X_CLIP.min / scale_x;
float min_y = pvrrc.fb_Y_CLIP.min / scale_y;
if (!is_rtt)
{
// Add x offset for aspect ratio > 4/3
min_x = min_x * dc2s_scale_h + ds2s_offs_x;
// Invert y coordinates when rendering to screen
min_y = screen_height - (min_y + height) * dc2s_scale_h;
width *= dc2s_scale_h;
height *= dc2s_scale_h;
if (ds2s_offs_x > 0)
{
float rounded_offs_x = ds2s_offs_x + 0.5f;
glcache.ClearColor(0.f, 0.f, 0.f, 0.f);
glcache.Enable(GL_SCISSOR_TEST);
glScissor(0, 0, rounded_offs_x, screen_height);
glClear(GL_COLOR_BUFFER_BIT);
glScissor(screen_width - rounded_offs_x, 0, rounded_offs_x, screen_height);
glClear(GL_COLOR_BUFFER_BIT);
}
}
else if (settings.rend.RenderToTextureUpscale > 1 && !settings.rend.RenderToTextureBuffer)
{
min_x *= settings.rend.RenderToTextureUpscale;
min_y *= settings.rend.RenderToTextureUpscale;
width *= settings.rend.RenderToTextureUpscale;
height *= settings.rend.RenderToTextureUpscale;
}
glScissor(min_x + 0.5f, min_y + 0.5f, width + 0.5f, height + 0.5f);
glcache.Enable(GL_SCISSOR_TEST);
}
//restore scale_x
scale_x /= scissoring_scale_x;
DrawStrips();
}
else
{
glcache.ClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT);
glBindBuffer(GL_ARRAY_BUFFER, gl.vbo.geometry); glCheck();
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, gl.vbo.idxs); glCheck();
DrawFramebuffer(dc_width, dc_height);
glBufferData(GL_ARRAY_BUFFER, pvrrc.verts.bytes(), pvrrc.verts.head(), GL_STREAM_DRAW);
upload_vertex_indices();
}
#if HOST_OS==OS_WINDOWS
//Sleep(40); //to test MT stability
#endif
eglCheck();
KillTex=false;
if (is_rtt)
ReadRTTBuffer();
else if (gl.swap_buffer_not_preserved)
save_current_frame();
return !is_rtt;
}
void rend_set_fb_scale(float x,float y)
{
fb_scale_x=x;
fb_scale_y=y;
}
struct glesrend : Renderer
{
bool Init() { return gles_init(); }
void Resize(int w, int h) { screen_width=w; screen_height=h; }
void Term()
{
if (KillTex)
killtex();
}
bool Process(TA_context* ctx) { return ProcessFrame(ctx); }
bool Render() { return RenderFrame(); }
void Present() { gl_swap(); glViewport(0, 0, screen_width, screen_height); }
void DrawOSD() { OSD_DRAW(gl.OSD_SHADER.program); }
virtual u32 GetTexture(TSP tsp, TCW tcw) {
return gl_GetTexture(tsp, tcw);
}
};
#include "deps/libpng/png.h"
FILE* pngfile;
void png_cstd_read(png_structp png_ptr, png_bytep data, png_size_t length)
{
fread(data,1, length,pngfile);
}
u8* loadPNGData(const string& fname, int &width, int &height, bool bottom_to_top)
{
const char* filename=fname.c_str();
FILE* file = fopen(filename, "rb");
pngfile=file;
if (!file)
{
EMUERROR("Error opening %s\n", filename);
return NULL;
}
//header for testing if it is a png
png_byte header[8];
//read the header
fread(header,1,8,file);
//test if png
int is_png = !png_sig_cmp(header, 0, 8);
if (!is_png)
{
fclose(file);
printf("Not a PNG file : %s\n", filename);
return NULL;
}
//create png struct
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL,
NULL, NULL);
if (!png_ptr)
{
fclose(file);
printf("Unable to create PNG struct : %s\n", filename);
return (NULL);
}
//create png info struct
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_read_struct(&png_ptr, (png_infopp) NULL, (png_infopp) NULL);
printf("Unable to create PNG info : %s\n", filename);
fclose(file);
return (NULL);
}
//create png info struct
png_infop end_info = png_create_info_struct(png_ptr);
if (!end_info)
{
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp) NULL);
printf("Unable to create PNG end info : %s\n", filename);
fclose(file);
return (NULL);
}
//png error stuff, not sure libpng man suggests this.
if (setjmp(png_jmpbuf(png_ptr)))
{
fclose(file);
printf("Error during setjmp : %s\n", filename);
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
return (NULL);
}
//init png reading
//png_init_io(png_ptr, fp);
png_set_read_fn(png_ptr, NULL, png_cstd_read);
//let libpng know you already read the first 8 bytes
png_set_sig_bytes(png_ptr, 8);
// read all the info up to the image data
png_read_info(png_ptr, info_ptr);
//variables to pass to get info
int bit_depth, color_type;
png_uint_32 twidth, theight;
// get info about png
png_get_IHDR(png_ptr, info_ptr, &twidth, &theight, &bit_depth, &color_type,
NULL, NULL, NULL);
//update width and height based on png info
width = twidth;
height = theight;
// Update the png info struct.
png_read_update_info(png_ptr, info_ptr);
// Row size in bytes.
int rowbytes = png_get_rowbytes(png_ptr, info_ptr);
// Allocate the image_data as a big block, to be given to opengl
png_byte *image_data = new png_byte[rowbytes * height];
if (!image_data)
{
//clean up memory and close stuff
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
printf("Unable to allocate image_data while loading %s\n", filename);
fclose(file);
return NULL;
}
//row_pointers is for pointing to image_data for reading the png with libpng
png_bytep *row_pointers = new png_bytep[height];
if (!row_pointers)
{
//clean up memory and close stuff
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
delete[] image_data;
printf("Unable to allocate row_pointer while loading %s\n", filename);
fclose(file);
return NULL;
}
// set the individual row_pointers to point at the correct offsets of image_data
if (bottom_to_top)
{
for (int i = 0; i < height; ++i)
row_pointers[height - 1 - i] = image_data + i * rowbytes;
}
else
{
for (int i = 0; i < height; ++i)
row_pointers[i] = image_data + i * rowbytes;
}
//read the png into image_data through row_pointers
png_read_image(png_ptr, row_pointers);
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
delete[] row_pointers;
fclose(file);
return image_data;
}
GLuint loadPNG(const string& fname, int &width, int &height, bool bottom_to_top)
{
png_byte *image_data = loadPNGData(fname, width, height);
if (image_data == NULL)
return TEXTURE_LOAD_ERROR;
//Now generate the OpenGL texture object
GLuint texture = glcache.GenTexture();
glcache.BindTexture(GL_TEXTURE_2D, texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA,
GL_UNSIGNED_BYTE, (GLvoid*) image_data);
glcache.TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
delete[] image_data;
return texture;
}
Renderer* rend_GLES2() { return new glesrend(); }
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