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dolphin/Source/Core/VideoBackends/OGL/Src/TextureConverter.cpp

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// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
// Fast image conversion using OpenGL shaders.
// This kind of stuff would be a LOT nicer with OpenCL.
#include "TextureConverter.h"
#include "TextureConversionShader.h"
#include "TextureCache.h"
#include "ProgramShaderCache.h"
#include "FramebufferManager.h"
#include "Globals.h"
#include "VideoConfig.h"
#include "ImageWrite.h"
#include "Render.h"
#include "FileUtil.h"
#include "HW/Memmap.h"
#include "DriverDetails.h"
namespace OGL
{
namespace TextureConverter
{
using OGL::TextureCache;
static GLuint s_texConvFrameBuffer = 0;
static GLuint s_srcTexture = 0; // for decoding from RAM
static GLuint s_dstTexture = 0; // for encoding to RAM
const int renderBufferWidth = 1024;
const int renderBufferHeight = 1024;
static SHADER s_rgbToYuyvProgram;
static SHADER s_yuyvToRgbProgram;
// Not all slots are taken - but who cares.
const u32 NUM_ENCODING_PROGRAMS = 64;
static SHADER s_encodingPrograms[NUM_ENCODING_PROGRAMS];
static GLuint s_encode_VBO = 0;
static GLuint s_encode_VAO = 0;
static GLuint s_decode_VAO = 0;
static TargetRectangle s_cached_sourceRc;
static const char *VProgram =
"ATTRIN vec2 rawpos;\n"
"ATTRIN vec2 tex0;\n"
"VARYOUT vec2 uv0;\n"
"void main()\n"
"{\n"
" uv0 = tex0;\n"
" gl_Position = vec4(rawpos, 0.0, 1.0);\n"
"}\n";
void CreatePrograms()
{
/* TODO: Accuracy Improvements
*
* This shader doesn't really match what the gamecube does interally in the
* copy pipeline.
* 1. It uses Opengl's built in filtering when yscaling, someone could work
* out how the copypipeline does it's filtering and implement it correctly
* in this shader.
* 2. Deflickering isn't implemented, a futher filtering over 3 lines.
* Isn't really needed on non-interlaced monitors (and would lower quality;
* But hey, accuracy!)
* 3. Flipper's YUYV conversion implements a 3 pixel horozontal blur on the
* UV channels, centering the U channel on the Left pixel and the V channel
* on the Right pixel.
* The current implementation Centers both UV channels at the same place
* inbetween the two Pixels, and only blurs over these two pixels.
*/
// Output is BGRA because that is slightly faster than RGBA.
const char *FProgramRgbToYuyv =
"uniform sampler2DRect samp9;\n"
"VARYIN vec2 uv0;\n"
"COLOROUT(ocol0)\n"
"void main()\n"
"{\n"
" vec3 c0 = texture2DRect(samp9, uv0 - dFdx(uv0) * 0.25).rgb;\n"
" vec3 c1 = texture2DRect(samp9, uv0 + dFdx(uv0) * 0.25).rgb;\n"
" vec3 c01 = (c0 + c1) * 0.5;\n"
" vec3 y_const = vec3(0.257,0.504,0.098);\n"
" vec3 u_const = vec3(-0.148,-0.291,0.439);\n"
" vec3 v_const = vec3(0.439,-0.368,-0.071);\n"
" vec4 const3 = vec4(0.0625,0.5,0.0625,0.5);\n"
" ocol0 = vec4(dot(c1,y_const),dot(c01,u_const),dot(c0,y_const),dot(c01, v_const)) + const3;\n"
"}\n";
/* TODO: Accuracy Improvements
*
* The YVYU to RGB conversion here matches the RGB to YUYV done above, but
* if a game modifies or adds images to the XFB then it should be using the
* same algorithm as the flipper, and could result in slight colour inaccuracies
* when run back through this shader.
*/
const char *VProgramYuyvToRgb =
"void main()\n"
"{\n"
" vec2 rawpos = vec2(gl_VertexID&1, gl_VertexID&2);\n"
" gl_Position = vec4(rawpos*2.0-1.0, 0.0, 1.0);\n"
"}\n";
const char *FProgramYuyvToRgb =
"uniform sampler2DRect samp9;\n"
"VARYIN vec2 uv0;\n"
"COLOROUT(ocol0)\n"
"void main()\n"
"{\n"
" ivec2 uv = ivec2(gl_FragCoord.xy);\n"
#ifdef USE_GLES3
// We switch top/bottom here. TODO: move this to screen blit.
" ivec2 ts = textureSize(samp9, 0);\n"
" vec4 c0 = texelFetch(samp9, ivec2(uv.x/2, ts.y-uv.y-1), 0);\n"
#else
" ivec2 ts = textureSize(samp9);\n"
" vec4 c0 = texelFetch(samp9, ivec2(uv.x/2, ts.y-uv.y-1));\n"
#endif
" float y = mix(c0.b, c0.r, uv.x & 1);\n"
" float yComp = 1.164 * (y - 0.0625);\n"
" float uComp = c0.g - 0.5;\n"
" float vComp = c0.a - 0.5;\n"
" ocol0 = vec4(yComp + (1.596 * vComp),\n"
" yComp - (0.813 * vComp) - (0.391 * uComp),\n"
" yComp + (2.018 * uComp),\n"
" 1.0);\n"
"}\n";
ProgramShaderCache::CompileShader(s_rgbToYuyvProgram, VProgram, FProgramRgbToYuyv);
ProgramShaderCache::CompileShader(s_yuyvToRgbProgram, VProgramYuyvToRgb, FProgramYuyvToRgb);
}
SHADER &GetOrCreateEncodingShader(u32 format)
{
if (format > NUM_ENCODING_PROGRAMS)
{
PanicAlert("Unknown texture copy format: 0x%x\n", format);
return s_encodingPrograms[0];
}
if (s_encodingPrograms[format].glprogid == 0)
{
const char* shader = TextureConversionShader::GenerateEncodingShader(format, API_OPENGL);
#if defined(_DEBUG) || defined(DEBUGFAST)
if (g_ActiveConfig.iLog & CONF_SAVESHADERS && shader)
{
static int counter = 0;
char szTemp[MAX_PATH];
sprintf(szTemp, "%senc_%04i.txt", File::GetUserPath(D_DUMP_IDX).c_str(), counter++);
SaveData(szTemp, shader);
}
#endif
ProgramShaderCache::CompileShader(s_encodingPrograms[format], VProgram, shader);
}
return s_encodingPrograms[format];
}
void Init()
{
glGenFramebuffers(1, &s_texConvFrameBuffer);
glGenBuffers(1, &s_encode_VBO );
glGenVertexArrays(1, &s_encode_VAO );
glBindBuffer(GL_ARRAY_BUFFER, s_encode_VBO );
glBindVertexArray( s_encode_VAO );
glEnableVertexAttribArray(SHADER_POSITION_ATTRIB);
glVertexAttribPointer(SHADER_POSITION_ATTRIB, 2, GL_FLOAT, 0, sizeof(GLfloat)*4, (GLfloat*)NULL);
glEnableVertexAttribArray(SHADER_TEXTURE0_ATTRIB);
glVertexAttribPointer(SHADER_TEXTURE0_ATTRIB, 2, GL_FLOAT, 0, sizeof(GLfloat)*4, (GLfloat*)NULL+2);
s_cached_sourceRc.top = -1;
s_cached_sourceRc.bottom = -1;
s_cached_sourceRc.left = -1;
s_cached_sourceRc.right = -1;
glGenVertexArrays(1, &s_decode_VAO );
glBindVertexArray( s_decode_VAO );
glActiveTexture(GL_TEXTURE0 + 9);
glGenTextures(1, &s_srcTexture);
glBindTexture(getFbType(), s_srcTexture);
glTexParameteri(getFbType(), GL_TEXTURE_MAX_LEVEL, 0);
glGenTextures(1, &s_dstTexture);
glBindTexture(GL_TEXTURE_2D, s_dstTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, renderBufferWidth, renderBufferHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
CreatePrograms();
}
void Shutdown()
{
glDeleteTextures(1, &s_srcTexture);
glDeleteTextures(1, &s_dstTexture);
glDeleteFramebuffers(1, &s_texConvFrameBuffer);
glDeleteBuffers(1, &s_encode_VBO );
glDeleteVertexArrays(1, &s_encode_VAO );
glDeleteVertexArrays(1, &s_decode_VAO );
s_rgbToYuyvProgram.Destroy();
s_yuyvToRgbProgram.Destroy();
for (auto& program : s_encodingPrograms)
program.Destroy();
s_srcTexture = 0;
s_dstTexture = 0;
s_texConvFrameBuffer = 0;
}
void EncodeToRamUsingShader(GLuint srcTexture, const TargetRectangle& sourceRc,
u8* destAddr, int dstWidth, int dstHeight, int readStride,
bool toTexture, bool linearFilter)
{
// switch to texture converter frame buffer
// attach render buffer as color destination
FramebufferManager::SetFramebuffer(s_texConvFrameBuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, s_dstTexture, 0);
GL_REPORT_ERRORD();
// set source texture
glActiveTexture(GL_TEXTURE0+9);
glBindTexture(getFbType(), srcTexture);
if (linearFilter)
{
glTexParameteri(getFbType(), GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(getFbType(), GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
else
{
glTexParameteri(getFbType(), GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(getFbType(), GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
GL_REPORT_ERRORD();
glViewport(0, 0, (GLsizei)dstWidth, (GLsizei)dstHeight);
GL_REPORT_ERRORD();
if(!(s_cached_sourceRc == sourceRc)) {
GLfloat vertices[] = {
-1.f, -1.f,
(float)sourceRc.left, (float)sourceRc.top,
-1.f, 1.f,
(float)sourceRc.left, (float)sourceRc.bottom,
1.f, -1.f,
(float)sourceRc.right, (float)sourceRc.top,
1.f, 1.f,
(float)sourceRc.right, (float)sourceRc.bottom
};
glBindBuffer(GL_ARRAY_BUFFER, s_encode_VBO );
glBufferData(GL_ARRAY_BUFFER, 4*4*sizeof(GLfloat), vertices, GL_STREAM_DRAW);
s_cached_sourceRc = sourceRc;
}
glBindVertexArray( s_encode_VAO );
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
GL_REPORT_ERRORD();
// .. and then read back the results.
// TODO: make this less slow.
int writeStride = bpmem.copyMipMapStrideChannels * 32;
if (writeStride != readStride && toTexture)
{
// writing to a texture of a different size
int readHeight = readStride / dstWidth;
readHeight /= 4; // 4 bytes per pixel
int readStart = 0;
int readLoops = dstHeight / readHeight;
for (int i = 0; i < readLoops; i++)
{
glReadPixels(0, readStart, (GLsizei)dstWidth, (GLsizei)readHeight, GL_BGRA, GL_UNSIGNED_BYTE, destAddr);
readStart += readHeight;
destAddr += writeStride;
}
}
else
glReadPixels(0, 0, (GLsizei)dstWidth, (GLsizei)dstHeight, GL_BGRA, GL_UNSIGNED_BYTE, destAddr);
GL_REPORT_ERRORD();
}
int EncodeToRamFromTexture(u32 address,GLuint source_texture, bool bFromZBuffer, bool bIsIntensityFmt, u32 copyfmt, int bScaleByHalf, const EFBRectangle& source)
{
u32 format = copyfmt;
if (bFromZBuffer)
{
format |= _GX_TF_ZTF;
if (copyfmt == 11)
format = GX_TF_Z16;
else if (format < GX_TF_Z8 || format > GX_TF_Z24X8)
format |= _GX_TF_CTF;
}
else
if (copyfmt > GX_TF_RGBA8 || (copyfmt < GX_TF_RGB565 && !bIsIntensityFmt))
format |= _GX_TF_CTF;
SHADER& texconv_shader = GetOrCreateEncodingShader(format);
u8 *dest_ptr = Memory::GetPointer(address);
int width = (source.right - source.left) >> bScaleByHalf;
int height = (source.bottom - source.top) >> bScaleByHalf;
int size_in_bytes = TexDecoder_GetTextureSizeInBytes(width, height, format);
u16 blkW = TexDecoder_GetBlockWidthInTexels(format) - 1;
u16 blkH = TexDecoder_GetBlockHeightInTexels(format) - 1;
u16 samples = TextureConversionShader::GetEncodedSampleCount(format);
// only copy on cache line boundaries
// extra pixels are copied but not displayed in the resulting texture
s32 expandedWidth = (width + blkW) & (~blkW);
s32 expandedHeight = (height + blkH) & (~blkH);
float sampleStride = bScaleByHalf ? 2.f : 1.f;
float params[] = {
Renderer::EFBToScaledXf(sampleStride), Renderer::EFBToScaledYf(sampleStride),
0.0f, 0.0f,
(float)expandedWidth, (float)Renderer::EFBToScaledY(expandedHeight)-1,
(float)Renderer::EFBToScaledX(source.left), (float)Renderer::EFBToScaledY(EFB_HEIGHT - source.top - expandedHeight)
};
texconv_shader.Bind();
glUniform4fv(texconv_shader.UniformLocations[0], 2, params);
TargetRectangle scaledSource;
scaledSource.top = 0;
scaledSource.bottom = expandedHeight;
scaledSource.left = 0;
scaledSource.right = expandedWidth / samples;
int cacheBytes = 32;
if ((format & 0x0f) == 6)
cacheBytes = 64;
int readStride = (expandedWidth * cacheBytes) /
TexDecoder_GetBlockWidthInTexels(format);
EncodeToRamUsingShader(source_texture, scaledSource,
dest_ptr, expandedWidth / samples, expandedHeight, readStride,
true, bScaleByHalf > 0 && !bFromZBuffer);
return size_in_bytes; // TODO: D3D11 is calculating this value differently!
}
void EncodeToRamYUYV(GLuint srcTexture, const TargetRectangle& sourceRc, u8* destAddr, int dstWidth, int dstHeight)
{
g_renderer->ResetAPIState();
s_rgbToYuyvProgram.Bind();
// We enable linear filtering, because the gamecube does filtering in the vertical direction when
// yscale is enabled.
// Otherwise we get jaggies when a game uses yscaling (most PAL games)
EncodeToRamUsingShader(srcTexture, sourceRc, destAddr, dstWidth / 2, dstHeight, 0, false, true);
FramebufferManager::SetFramebuffer(0);
TextureCache::DisableStage(0);
g_renderer->RestoreAPIState();
GL_REPORT_ERRORD();
}
// Should be scale free.
void DecodeToTexture(u32 xfbAddr, int srcWidth, int srcHeight, GLuint destTexture)
{
u8* srcAddr = Memory::GetPointer(xfbAddr);
if (!srcAddr)
{
WARN_LOG(VIDEO, "Tried to decode from invalid memory address");
return;
}
g_renderer->ResetAPIState(); // reset any game specific settings
// switch to texture converter frame buffer
// attach destTexture as color destination
FramebufferManager::SetFramebuffer(s_texConvFrameBuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, destTexture, 0);
GL_REPORT_FBO_ERROR();
// activate source texture
// set srcAddr as data for source texture
glActiveTexture(GL_TEXTURE0+9);
glBindTexture(getFbType(), s_srcTexture);
glTexImage2D(getFbType(), 0, GL_RGBA, srcWidth / 2, srcHeight, 0, GL_BGRA, GL_UNSIGNED_BYTE, srcAddr);
glViewport(0, 0, srcWidth, srcHeight);
s_yuyvToRgbProgram.Bind();
glBindVertexArray( s_decode_VAO );
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
FramebufferManager::SetFramebuffer(0);
g_renderer->RestoreAPIState();
GL_REPORT_ERRORD();
}
} // namespace
} // namespace OGL
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