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Blitter handles color/depth texture copies.

This commit is contained in:
Ben Vanik 2015-03-07 16:12:52 -08:00
parent d72610ba1b
commit b9f9e1bb2b
5 changed files with 360 additions and 203 deletions
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230
src/xenia/gpu/gl4/blitter.cc
View File

@ -23,12 +23,15 @@ extern "C" WGLEWContext* wglewGetContext();
Blitter::Blitter() Blitter::Blitter()
: vertex_program_(0), : vertex_program_(0),
fragment_program_(0), color_fragment_program_(0),
pipeline_(0), depth_fragment_program_(0),
color_pipeline_(0),
depth_pipeline_(0),
vbo_(0), vbo_(0),
vao_(0), vao_(0),
nearest_sampler_(0), nearest_sampler_(0),
linear_sampler_(0) {} linear_sampler_(0),
scratch_framebuffer_(0) {}
Blitter::~Blitter() = default; Blitter::~Blitter() = default;
@ -43,7 +46,7 @@ precision highp int; \n\
layout(std140, column_major) uniform; \n\ layout(std140, column_major) uniform; \n\
layout(std430, column_major) buffer; \n\ layout(std430, column_major) buffer; \n\
struct VertexData { \n\ struct VertexData { \n\
vec2 uv; \n\ vec2 uv; \n\
}; \n\ }; \n\
"; ";
const std::string vs_source = header + const std::string vs_source = header +
@ -55,37 +58,51 @@ out gl_PerVertex { \n\
float gl_ClipDistance[]; \n\ float gl_ClipDistance[]; \n\
}; \n\ }; \n\
struct VertexFetch { \n\ struct VertexFetch { \n\
vec2 pos; \n\ vec2 pos; \n\
};\n\ };\n\
layout(location = 0) in VertexFetch vfetch; \n\ layout(location = 0) in VertexFetch vfetch; \n\
layout(location = 0) out VertexData vtx; \n\ layout(location = 0) out VertexData vtx; \n\
void main() { \n\ void main() { \n\
gl_Position = vec4(vfetch.pos.xy * vec2(2.0, 2.0) - vec2(1.0, 1.0), 0.0, 1.0); \n\ gl_Position = vec4(vfetch.pos.xy * vec2(2.0, -2.0) - vec2(1.0, -1.0), 0.0, 1.0); \n\
vtx.uv = vfetch.pos.xy * src_uv_params.zw + src_uv_params.xy; \n\ vtx.uv = vfetch.pos.xy * src_uv_params.zw + src_uv_params.xy; \n\
} \n\ } \n\
"; ";
const std::string fs_source = header + const std::string color_fs_source = header +
"\n\ "\n\
layout(location = 1) uniform sampler2D src_texture; \n\ layout(location = 1) uniform sampler2D src_texture; \n\
layout(location = 0) in VertexData vtx; \n\ layout(location = 0) in VertexData vtx; \n\
layout(location = 0) out vec4 oC; \n\ layout(location = 0) out vec4 oC; \n\
void main() { \n\ void main() { \n\
vec4 color = texture(src_texture, vtx.uv); \n\ oC = texture(src_texture, vtx.uv); \n\
oC = color; \n\ } \n\
";
const std::string depth_fs_source = header +
"\n\
layout(location = 1) uniform sampler2D src_texture; \n\
layout(location = 0) in VertexData vtx; \n\
layout(location = 0) out vec4 oC; \n\
void main() { \n\
vec4 c = texture(src_texture, vtx.uv); \n\
gl_FragDepth = c.r; \n\
} \n\ } \n\
"; ";
auto vs_source_str = vs_source.c_str(); auto vs_source_str = vs_source.c_str();
vertex_program_ = glCreateShaderProgramv(GL_VERTEX_SHADER, 1, &vs_source_str); vertex_program_ = glCreateShaderProgramv(GL_VERTEX_SHADER, 1, &vs_source_str);
auto fs_source_str = fs_source.c_str(); auto color_fs_source_str = color_fs_source.c_str();
fragment_program_ = color_fragment_program_ =
glCreateShaderProgramv(GL_FRAGMENT_SHADER, 1, &fs_source_str); glCreateShaderProgramv(GL_FRAGMENT_SHADER, 1, &color_fs_source_str);
char log[2048]; auto depth_fs_source_str = depth_fs_source.c_str();
GLsizei log_length; depth_fragment_program_ =
glGetProgramInfoLog(vertex_program_, 2048, &log_length, log); glCreateShaderProgramv(GL_FRAGMENT_SHADER, 1, &depth_fs_source_str);
glCreateProgramPipelines(1, &pipeline_); glCreateProgramPipelines(1, &color_pipeline_);
glUseProgramStages(pipeline_, GL_VERTEX_SHADER_BIT, vertex_program_); glUseProgramStages(color_pipeline_, GL_VERTEX_SHADER_BIT, vertex_program_);
glUseProgramStages(pipeline_, GL_FRAGMENT_SHADER_BIT, fragment_program_); glUseProgramStages(color_pipeline_, GL_FRAGMENT_SHADER_BIT,
color_fragment_program_);
glCreateProgramPipelines(1, &depth_pipeline_);
glUseProgramStages(depth_pipeline_, GL_VERTEX_SHADER_BIT, vertex_program_);
glUseProgramStages(depth_pipeline_, GL_FRAGMENT_SHADER_BIT,
depth_fragment_program_);
glCreateBuffers(1, &vbo_); glCreateBuffers(1, &vbo_);
static const GLfloat vbo_data[] = { static const GLfloat vbo_data[] = {
@ -110,38 +127,96 @@ oC = color; \n\
glSamplerParameteri(linear_sampler_, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glSamplerParameteri(linear_sampler_, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(linear_sampler_, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glSamplerParameteri(linear_sampler_, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glCreateFramebuffers(1, &scratch_framebuffer_);
return true; return true;
} }
void Blitter::Shutdown() { void Blitter::Shutdown() {
if (vertex_program_) { glDeleteFramebuffers(1, &scratch_framebuffer_);
glDeleteProgram(vertex_program_); glDeleteProgram(vertex_program_);
} glDeleteProgram(color_fragment_program_);
if (fragment_program_) { glDeleteProgram(depth_fragment_program_);
glDeleteProgram(fragment_program_); glDeleteProgramPipelines(1, &color_pipeline_);
} glDeleteProgramPipelines(1, &depth_pipeline_);
if (pipeline_) { glDeleteBuffers(1, &vbo_);
glDeleteProgramPipelines(1, &pipeline_); glDeleteVertexArrays(1, &vao_);
} glDeleteSamplers(1, &nearest_sampler_);
if (vbo_) { glDeleteSamplers(1, &linear_sampler_);
glDeleteBuffers(1, &vbo_);
}
if (vao_) {
glDeleteVertexArrays(1, &vao_);
}
if (nearest_sampler_) {
glDeleteSamplers(1, &nearest_sampler_);
}
if (linear_sampler_) {
glDeleteSamplers(1, &linear_sampler_);
}
} }
struct SavedState {
GLboolean scissor_test_enabled;
GLboolean depth_test_enabled;
GLboolean depth_mask_enabled;
GLint depth_func;
GLboolean stencil_test_enabled;
GLboolean cull_face_enabled;
GLint cull_face;
GLint front_face;
GLint polygon_mode;
GLboolean color_mask_0_enabled[4];
GLboolean blend_0_enabled;
GLint draw_buffer;
GLfloat viewport[4];
GLint program_pipeline;
GLint vertex_array;
GLint texture_0;
GLint sampler_0;
void Save() {
scissor_test_enabled = glIsEnabled(GL_SCISSOR_TEST);
depth_test_enabled = glIsEnabled(GL_DEPTH_TEST);
glGetBooleanv(GL_DEPTH_WRITEMASK, &depth_mask_enabled);
glGetIntegerv(GL_DEPTH_FUNC, &depth_func);
stencil_test_enabled = glIsEnabled(GL_STENCIL_TEST);
cull_face_enabled = glIsEnabled(GL_CULL_FACE);
glGetIntegerv(GL_CULL_FACE_MODE, &cull_face);
glGetIntegerv(GL_FRONT_FACE, &front_face);
glGetIntegerv(GL_POLYGON_MODE, &polygon_mode);
glGetBooleani_v(GL_COLOR_WRITEMASK, 0, (GLboolean*)&color_mask_0_enabled);
blend_0_enabled = glIsEnabledi(GL_BLEND, 0);
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &draw_buffer);
glGetFloati_v(GL_VIEWPORT, 0, viewport);
glGetIntegerv(GL_PROGRAM_PIPELINE_BINDING, &program_pipeline);
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &vertex_array);
glGetIntegerv(GL_TEXTURE_BINDING_2D, &texture_0);
glGetIntegeri_v(GL_SAMPLER_BINDING, 0, &sampler_0);
}
void Restore() {
scissor_test_enabled ? glEnable(GL_SCISSOR_TEST)
: glDisable(GL_SCISSOR_TEST);
depth_test_enabled ? glEnable(GL_DEPTH_TEST) : glDisable(GL_DEPTH_TEST);
glDepthMask(depth_mask_enabled);
glDepthFunc(depth_func);
stencil_test_enabled ? glEnable(GL_STENCIL_TEST)
: glDisable(GL_STENCIL_TEST);
cull_face_enabled ? glEnable(GL_CULL_FACE) : glDisable(GL_CULL_FACE);
glCullFace(cull_face);
glFrontFace(front_face);
glPolygonMode(GL_FRONT_AND_BACK, polygon_mode);
glColorMaski(0, color_mask_0_enabled[0], color_mask_0_enabled[1],
color_mask_0_enabled[2], color_mask_0_enabled[3]);
blend_0_enabled ? glEnablei(GL_BLEND, 0) : glDisablei(GL_BLEND, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, draw_buffer);
glViewportIndexedf(0, viewport[0], viewport[1], viewport[2], viewport[3]);
glBindProgramPipeline(program_pipeline);
glBindVertexArray(vertex_array);
glBindTexture(GL_TEXTURE_2D, texture_0);
glBindSampler(0, sampler_0);
}
};
void Blitter::Draw(GLuint src_texture, uint32_t src_x, uint32_t src_y, void Blitter::Draw(GLuint src_texture, uint32_t src_x, uint32_t src_y,
uint32_t src_width, uint32_t src_height, GLenum filter) { uint32_t src_width, uint32_t src_height, GLenum filter) {
glDisable(GL_SCISSOR_TEST);
glDisable(GL_STENCIL_TEST);
glDisablei(GL_BLEND, 0); glDisablei(GL_BLEND, 0);
glDisable(GL_DEPTH_TEST); glEnable(GL_CULL_FACE);
glBindProgramPipeline(pipeline_); glCullFace(GL_BACK);
glFrontFace(GL_CW);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glBindVertexArray(vao_); glBindVertexArray(vao_);
glBindTextures(0, 1, &src_texture); glBindTextures(0, 1, &src_texture);
switch (filter) { switch (filter) {
@ -167,12 +242,6 @@ void Blitter::Draw(GLuint src_texture, uint32_t src_x, uint32_t src_y,
src_height / float(src_texture_height)); src_height / float(src_texture_height));
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glBindProgramPipeline(0);
glBindVertexArray(0);
GLuint zero = 0;
glBindTextures(0, 1, &zero);
glBindSampler(0, 0);
} }
void Blitter::BlitTexture2D(GLuint src_texture, uint32_t src_x, uint32_t src_y, void Blitter::BlitTexture2D(GLuint src_texture, uint32_t src_x, uint32_t src_y,
@ -180,17 +249,70 @@ void Blitter::BlitTexture2D(GLuint src_texture, uint32_t src_x, uint32_t src_y,
uint32_t dest_x, uint32_t dest_y, uint32_t dest_x, uint32_t dest_y,
uint32_t dest_width, uint32_t dest_height, uint32_t dest_width, uint32_t dest_height,
GLenum filter) { GLenum filter) {
SavedState state;
state.Save();
glViewport(dest_x, dest_y, dest_width, dest_height); glViewport(dest_x, dest_y, dest_width, dest_height);
glColorMaski(0, true, true, true, true);
glDisable(GL_DEPTH_TEST);
glDepthMask(false);
glBindProgramPipeline(color_pipeline_);
Draw(src_texture, src_x, src_y, src_width, src_height, filter); Draw(src_texture, src_x, src_y, src_width, src_height, filter);
state.Restore();
} }
void Blitter::CopyTexture2D(GLuint src_texture, uint32_t src_x, uint32_t src_y, void Blitter::CopyColorTexture2D(GLuint src_texture, uint32_t src_x,
uint32_t src_width, uint32_t src_height, uint32_t src_y, uint32_t src_width,
uint32_t dest_texture, uint32_t dest_x, uint32_t src_height, uint32_t dest_texture,
uint32_t dest_y, uint32_t dest_width, uint32_t dest_x, uint32_t dest_y,
uint32_t dest_height, GLenum filter) { uint32_t dest_width, uint32_t dest_height,
GLenum filter) {
SavedState state;
state.Save();
glViewport(dest_x, dest_y, dest_width, dest_height); glViewport(dest_x, dest_y, dest_width, dest_height);
// glColorMaski(0, true, true, true, true);
glDisable(GL_DEPTH_TEST);
glDepthMask(false);
glBindProgramPipeline(color_pipeline_);
glNamedFramebufferTexture(scratch_framebuffer_, GL_COLOR_ATTACHMENT0,
dest_texture, 0);
glNamedFramebufferDrawBuffer(scratch_framebuffer_, GL_COLOR_ATTACHMENT0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, scratch_framebuffer_);
Draw(src_texture, src_x, src_y, src_width, src_height, filter);
glNamedFramebufferDrawBuffer(scratch_framebuffer_, GL_NONE);
glNamedFramebufferTexture(scratch_framebuffer_, GL_COLOR_ATTACHMENT0, GL_NONE,
0);
state.Restore();
}
void Blitter::CopyDepthTexture(GLuint src_texture, uint32_t src_x,
uint32_t src_y, uint32_t src_width,
uint32_t src_height, uint32_t dest_texture,
uint32_t dest_x, uint32_t dest_y,
uint32_t dest_width, uint32_t dest_height) {
SavedState state;
state.Save();
glViewport(dest_x, dest_y, dest_width, dest_height);
glColorMaski(0, false, false, false, false);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_ALWAYS);
glDepthMask(true);
glBindProgramPipeline(depth_pipeline_);
glNamedFramebufferTexture(scratch_framebuffer_, GL_DEPTH_STENCIL_ATTACHMENT,
dest_texture, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, scratch_framebuffer_);
Draw(src_texture, src_x, src_y, src_width, src_height, GL_NEAREST);
glNamedFramebufferTexture(scratch_framebuffer_, GL_DEPTH_STENCIL_ATTACHMENT,
GL_NONE, 0);
state.Restore();
} }
} // namespace gl4 } // namespace gl4

20
src/xenia/gpu/gl4/blitter.h
View File

@ -32,22 +32,30 @@ class Blitter {
uint32_t dest_y, uint32_t dest_width, uint32_t dest_height, uint32_t dest_y, uint32_t dest_width, uint32_t dest_height,
GLenum filter); GLenum filter);
void CopyTexture2D(GLuint src_texture, uint32_t src_x, uint32_t src_y, void CopyColorTexture2D(GLuint src_texture, uint32_t src_x, uint32_t src_y,
uint32_t src_width, uint32_t src_height, uint32_t src_width, uint32_t src_height,
uint32_t dest_texture, uint32_t dest_x, uint32_t dest_y, uint32_t dest_texture, uint32_t dest_x,
uint32_t dest_width, uint32_t dest_height, GLenum filter); uint32_t dest_y, uint32_t dest_width,
uint32_t dest_height, GLenum filter);
void CopyDepthTexture(GLuint src_texture, uint32_t src_x, uint32_t src_y,
uint32_t src_width, uint32_t src_height,
uint32_t dest_texture, uint32_t dest_x, uint32_t dest_y,
uint32_t dest_width, uint32_t dest_height);
private: private:
void Draw(GLuint src_texture, uint32_t src_x, uint32_t src_y, void Draw(GLuint src_texture, uint32_t src_x, uint32_t src_y,
uint32_t src_width, uint32_t src_height, GLenum filter); uint32_t src_width, uint32_t src_height, GLenum filter);
GLuint vertex_program_; GLuint vertex_program_;
GLuint fragment_program_; GLuint color_fragment_program_;
GLuint pipeline_; GLuint depth_fragment_program_;
GLuint color_pipeline_;
GLuint depth_pipeline_;
GLuint vbo_; GLuint vbo_;
GLuint vao_; GLuint vao_;
GLuint nearest_sampler_; GLuint nearest_sampler_;
GLuint linear_sampler_; GLuint linear_sampler_;
GLuint scratch_framebuffer_;
}; };
} // namespace gl4 } // namespace gl4

32
src/xenia/gpu/gl4/command_processor.cc
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@ -2472,7 +2472,7 @@ bool CommandProcessor::IssueCopy() {
glPixelStorei(GL_PACK_SWAP_BYTES, GL_TRUE); glPixelStorei(GL_PACK_SWAP_BYTES, GL_TRUE);
break; break;
default: default:
//assert_unhandled_case(copy_dest_endian); // assert_unhandled_case(copy_dest_endian);
glPixelStorei(GL_PACK_SWAP_BYTES, GL_TRUE); glPixelStorei(GL_PACK_SWAP_BYTES, GL_TRUE);
break; break;
} }
@ -2498,29 +2498,26 @@ bool CommandProcessor::IssueCopy() {
uint32_t h = copy_dest_height; uint32_t h = copy_dest_height;
// Make active so glReadPixels reads from us. // Make active so glReadPixels reads from us.
glBindFramebuffer(GL_READ_FRAMEBUFFER, source_framebuffer->framebuffer);
switch (copy_command) { switch (copy_command) {
case CopyCommand::kRaw: { case CopyCommand::kRaw: {
// This performs a byte-for-byte copy of the textures from src to dest // This performs a byte-for-byte copy of the textures from src to dest
// with no conversion. Byte swapping may still occur. // with no conversion. Byte swapping may still occur.
if (copy_src_select <= 3) { if (copy_src_select <= 3) {
// Source from a bound render target. // Source from a bound render target.
glNamedFramebufferReadBuffer(source_framebuffer->framebuffer,
GL_COLOR_ATTACHMENT0 + copy_src_select);
// TODO(benvanik): RAW copy. // TODO(benvanik): RAW copy.
last_framebuffer_texture_ = texture_cache_.CopyReadBufferTexture( last_framebuffer_texture_ = texture_cache_.CopyTexture(
copy_dest_base, x, y, w, h, context_->blitter(), copy_dest_base, x, y, w, h,
ColorFormatToTextureFormat(copy_dest_format), ColorFormatToTextureFormat(copy_dest_format),
copy_dest_swap ? true : false); copy_dest_swap ? true : false, color_targets[copy_src_select]);
if (!FLAGS_disable_framebuffer_readback) { if (!FLAGS_disable_framebuffer_readback) {
// glReadPixels(x, y, w, h, read_format, read_type, ptr); // glReadPixels(x, y, w, h, read_format, read_type, ptr);
} }
} else { } else {
// Source from the bound depth/stencil target. // Source from the bound depth/stencil target.
// TODO(benvanik): RAW copy. // TODO(benvanik): RAW copy.
texture_cache_.CopyReadBufferTexture(copy_dest_base, x, y, w, h, texture_cache_.CopyTexture(context_->blitter(), copy_dest_base, x, y, w,
src_format, h, src_format, copy_dest_swap ? true : false,
copy_dest_swap ? true : false); depth_target);
if (!FLAGS_disable_framebuffer_readback) { if (!FLAGS_disable_framebuffer_readback) {
// glReadPixels(x, y, w, h, GL_DEPTH_STENCIL, read_type, ptr); // glReadPixels(x, y, w, h, GL_DEPTH_STENCIL, read_type, ptr);
} }
@ -2530,22 +2527,20 @@ bool CommandProcessor::IssueCopy() {
case CopyCommand::kConvert: { case CopyCommand::kConvert: {
if (copy_src_select <= 3) { if (copy_src_select <= 3) {
// Source from a bound render target. // Source from a bound render target.
glNamedFramebufferReadBuffer(source_framebuffer->framebuffer,
GL_COLOR_ATTACHMENT0 + copy_src_select);
// Either copy the readbuffer into an existing texture or create a new // Either copy the readbuffer into an existing texture or create a new
// one in the cache so we can service future upload requests. // one in the cache so we can service future upload requests.
last_framebuffer_texture_ = texture_cache_.CopyReadBufferTexture( last_framebuffer_texture_ = texture_cache_.ConvertTexture(
copy_dest_base, x, y, w, h, context_->blitter(), copy_dest_base, x, y, w, h,
ColorFormatToTextureFormat(copy_dest_format), ColorFormatToTextureFormat(copy_dest_format),
copy_dest_swap ? true : false); copy_dest_swap ? true : false, color_targets[copy_src_select]);
if (!FLAGS_disable_framebuffer_readback) { if (!FLAGS_disable_framebuffer_readback) {
// glReadPixels(x, y, w, h, read_format, read_type, ptr); // glReadPixels(x, y, w, h, read_format, read_type, ptr);
} }
} else { } else {
// Source from the bound depth/stencil target. // Source from the bound depth/stencil target.
texture_cache_.CopyReadBufferTexture(copy_dest_base, x, y, w, h, texture_cache_.ConvertTexture(
src_format, context_->blitter(), copy_dest_base, x, y, w, h, src_format,
copy_dest_swap ? true : false); copy_dest_swap ? true : false, depth_target);
if (!FLAGS_disable_framebuffer_readback) { if (!FLAGS_disable_framebuffer_readback) {
// glReadPixels(x, y, w, h, GL_DEPTH_STENCIL, read_type, ptr); // glReadPixels(x, y, w, h, GL_DEPTH_STENCIL, read_type, ptr);
} }
@ -2558,7 +2553,6 @@ bool CommandProcessor::IssueCopy() {
// assert_unhandled_case(copy_command); // assert_unhandled_case(copy_command);
return false; return false;
} }
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
// Perform any requested clears. // Perform any requested clears.
uint32_t copy_depth_clear = regs[XE_GPU_REG_RB_DEPTH_CLEAR].u32; uint32_t copy_depth_clear = regs[XE_GPU_REG_RB_DEPTH_CLEAR].u32;

268
src/xenia/gpu/gl4/texture_cache.cc
View File

@ -33,112 +33,112 @@ struct TextureConfig {
// http://dench.flatlib.jp/opengl/textures // http://dench.flatlib.jp/opengl/textures
// http://fossies.org/linux/WebKit/Source/ThirdParty/ANGLE/src/libGLESv2/formatutils.cpp // http://fossies.org/linux/WebKit/Source/ThirdParty/ANGLE/src/libGLESv2/formatutils.cpp
static const TextureConfig texture_configs[64] = { static const TextureConfig texture_configs[64] = {
{ TextureFormat::k_1_REVERSE, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_1_REVERSE, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_1, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM }, {TextureFormat::k_1, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_8, GL_R8, GL_RED, GL_UNSIGNED_BYTE }, {TextureFormat::k_8, GL_R8, GL_RED, GL_UNSIGNED_BYTE},
{ TextureFormat::k_1_5_5_5, GL_RGB5_A1, GL_RGBA, {TextureFormat::k_1_5_5_5, GL_RGB5_A1, GL_RGBA,
GL_UNSIGNED_SHORT_1_5_5_5_REV }, GL_UNSIGNED_SHORT_1_5_5_5_REV},
{ TextureFormat::k_5_6_5, GL_RGB565, GL_RGB, GL_UNSIGNED_SHORT_5_6_5 }, {TextureFormat::k_5_6_5, GL_RGB565, GL_RGB, GL_UNSIGNED_SHORT_5_6_5},
{ TextureFormat::k_6_5_5, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM }, {TextureFormat::k_6_5_5, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_8_8_8_8, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE }, {TextureFormat::k_8_8_8_8, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE},
{ TextureFormat::k_2_10_10_10, GL_RGB10_A2, GL_RGBA, {TextureFormat::k_2_10_10_10, GL_RGB10_A2, GL_RGBA,
GL_UNSIGNED_INT_2_10_10_10_REV }, GL_UNSIGNED_INT_2_10_10_10_REV},
{ TextureFormat::k_8_A, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM }, {TextureFormat::k_8_A, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_8_B, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM }, {TextureFormat::k_8_B, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_8_8, GL_RG8, GL_RG, GL_UNSIGNED_BYTE }, {TextureFormat::k_8_8, GL_RG8, GL_RG, GL_UNSIGNED_BYTE},
{ TextureFormat::k_Cr_Y1_Cb_Y0, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_Cr_Y1_Cb_Y0, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_Y1_Cr_Y0_Cb, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_Y1_Cr_Y0_Cb, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::kUnknown, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::kUnknown, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_8_8_8_8_A, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_8_8_8_8_A, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_4_4_4_4, GL_RGBA4, GL_RGBA, {TextureFormat::k_4_4_4_4, GL_RGBA4, GL_RGBA,
GL_UNSIGNED_SHORT_4_4_4_4_REV }, GL_UNSIGNED_SHORT_4_4_4_4_REV},
{ TextureFormat::k_10_11_11, GL_R11F_G11F_B10F, GL_RGB, {TextureFormat::k_10_11_11, GL_R11F_G11F_B10F, GL_RGB,
GL_UNSIGNED_INT_10F_11F_11F_REV }, // ? GL_UNSIGNED_INT_10F_11F_11F_REV}, // ?
{ TextureFormat::k_11_11_10, GL_R11F_G11F_B10F, GL_RGB, {TextureFormat::k_11_11_10, GL_R11F_G11F_B10F, GL_RGB,
GL_UNSIGNED_INT_10F_11F_11F_REV }, // ? GL_UNSIGNED_INT_10F_11F_11F_REV}, // ?
{ TextureFormat::k_DXT1, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, {TextureFormat::k_DXT1, GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE }, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE},
{ TextureFormat::k_DXT2_3, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, {TextureFormat::k_DXT2_3, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,
GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, GL_UNSIGNED_BYTE }, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, GL_UNSIGNED_BYTE},
{ TextureFormat::k_DXT4_5, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, {TextureFormat::k_DXT4_5, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT,
GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, GL_UNSIGNED_BYTE }, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, GL_UNSIGNED_BYTE},
{ TextureFormat::kUnknown, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::kUnknown, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_24_8, GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL, {TextureFormat::k_24_8, GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL,
GL_UNSIGNED_INT_24_8 }, GL_UNSIGNED_INT_24_8},
{ TextureFormat::k_24_8_FLOAT, GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL, {TextureFormat::k_24_8_FLOAT, GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL,
GL_FLOAT_32_UNSIGNED_INT_24_8_REV }, GL_FLOAT_32_UNSIGNED_INT_24_8_REV},
{ TextureFormat::k_16, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM }, {TextureFormat::k_16, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_16_16, GL_RG16, GL_RG, GL_UNSIGNED_SHORT }, {TextureFormat::k_16_16, GL_RG16, GL_RG, GL_UNSIGNED_SHORT},
{ TextureFormat::k_16_16_16_16, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_16_16_16_16, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_16_EXPAND, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_16_EXPAND, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_16_16_EXPAND, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_16_16_EXPAND, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_16_16_16_16_EXPAND, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_16_16_16_16_EXPAND, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_16_FLOAT, GL_R16F, GL_RED, GL_HALF_FLOAT }, {TextureFormat::k_16_FLOAT, GL_R16F, GL_RED, GL_HALF_FLOAT},
{ TextureFormat::k_16_16_FLOAT, GL_RG16F, GL_RG, GL_HALF_FLOAT }, {TextureFormat::k_16_16_FLOAT, GL_RG16F, GL_RG, GL_HALF_FLOAT},
{ TextureFormat::k_16_16_16_16_FLOAT, GL_RGBA16F, GL_RGBA, GL_HALF_FLOAT }, {TextureFormat::k_16_16_16_16_FLOAT, GL_RGBA16F, GL_RGBA, GL_HALF_FLOAT},
{ TextureFormat::k_32, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM }, {TextureFormat::k_32, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_32_32, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM }, {TextureFormat::k_32_32, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_32_32_32_32, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_32_32_32_32, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_32_FLOAT, GL_R32F, GL_RED, GL_FLOAT }, {TextureFormat::k_32_FLOAT, GL_R32F, GL_RED, GL_FLOAT},
{ TextureFormat::k_32_32_FLOAT, GL_RG32F, GL_RG, GL_FLOAT }, {TextureFormat::k_32_32_FLOAT, GL_RG32F, GL_RG, GL_FLOAT},
{ TextureFormat::k_32_32_32_32_FLOAT, GL_RGBA32F, GL_RGBA, GL_FLOAT }, {TextureFormat::k_32_32_32_32_FLOAT, GL_RGBA32F, GL_RGBA, GL_FLOAT},
{ TextureFormat::k_32_AS_8, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_32_AS_8, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_32_AS_8_8, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_32_AS_8_8, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_16_MPEG, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_16_MPEG, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_16_16_MPEG, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_16_16_MPEG, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_8_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_8_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_32_AS_8_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_32_AS_8_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_32_AS_8_8_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_32_AS_8_8_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_16_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_16_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_16_MPEG_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_16_MPEG_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_16_16_MPEG_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_16_16_MPEG_INTERLACED, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_DXN, GL_COMPRESSED_RG_RGTC2, GL_COMPRESSED_RG_RGTC2, {TextureFormat::k_DXN, GL_COMPRESSED_RG_RGTC2, GL_COMPRESSED_RG_RGTC2,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::k_8_8_8_8_AS_16_16_16_16, GL_RGBA8, GL_RGBA, {TextureFormat::k_8_8_8_8_AS_16_16_16_16, GL_RGBA8, GL_RGBA,
GL_UNSIGNED_BYTE }, GL_UNSIGNED_BYTE},
{ TextureFormat::k_DXT1_AS_16_16_16_16, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, {TextureFormat::k_DXT1_AS_16_16_16_16, GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE }, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE},
{ TextureFormat::k_DXT2_3_AS_16_16_16_16, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, {TextureFormat::k_DXT2_3_AS_16_16_16_16, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,
GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, GL_UNSIGNED_BYTE }, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, GL_UNSIGNED_BYTE},
{ TextureFormat::k_DXT4_5_AS_16_16_16_16, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, {TextureFormat::k_DXT4_5_AS_16_16_16_16, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT,
GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, GL_UNSIGNED_BYTE }, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, GL_UNSIGNED_BYTE},
{ TextureFormat::k_2_10_10_10_AS_16_16_16_16, GL_RGB10_A2, GL_RGBA, {TextureFormat::k_2_10_10_10_AS_16_16_16_16, GL_RGB10_A2, GL_RGBA,
GL_UNSIGNED_INT_2_10_10_10_REV }, GL_UNSIGNED_INT_2_10_10_10_REV},
{ TextureFormat::k_10_11_11_AS_16_16_16_16, GL_R11F_G11F_B10F, GL_RGB, {TextureFormat::k_10_11_11_AS_16_16_16_16, GL_R11F_G11F_B10F, GL_RGB,
GL_UNSIGNED_INT_10F_11F_11F_REV }, GL_UNSIGNED_INT_10F_11F_11F_REV},
{ TextureFormat::k_11_11_10_AS_16_16_16_16, GL_R11F_G11F_B10F, {TextureFormat::k_11_11_10_AS_16_16_16_16, GL_R11F_G11F_B10F,
GL_INVALID_ENUM, GL_INVALID_ENUM }, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_32_32_32_FLOAT, GL_RGB32F, GL_RGB, GL_FLOAT }, {TextureFormat::k_32_32_32_FLOAT, GL_RGB32F, GL_RGB, GL_FLOAT},
{ TextureFormat::k_DXT3A, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM }, {TextureFormat::k_DXT3A, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_DXT5A, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM }, {TextureFormat::k_DXT5A, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_CTX1, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM }, {TextureFormat::k_CTX1, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM},
{ TextureFormat::k_DXT3A_AS_1_1_1_1, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::k_DXT3A_AS_1_1_1_1, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::kUnknown, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::kUnknown, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
{ TextureFormat::kUnknown, GL_INVALID_ENUM, GL_INVALID_ENUM, {TextureFormat::kUnknown, GL_INVALID_ENUM, GL_INVALID_ENUM,
GL_INVALID_ENUM }, GL_INVALID_ENUM},
}; };
TextureCache::TextureCache() : memory_(nullptr), scratch_buffer_(nullptr) { TextureCache::TextureCache() : memory_(nullptr), scratch_buffer_(nullptr) {
@ -526,11 +526,24 @@ TextureCache::TextureEntry* TextureCache::LookupAddress(uint32_t guest_address,
return nullptr; return nullptr;
} }
GLuint TextureCache::CopyReadBufferTexture(uint32_t guest_address, uint32_t x, GLuint TextureCache::CopyTexture(Blitter* blitter, uint32_t guest_address,
uint32_t y, uint32_t width, uint32_t x, uint32_t y, uint32_t width,
uint32_t height, uint32_t height, TextureFormat format,
TextureFormat format, bool swap_channels, GLuint src_texture) {
bool swap_channels) { return ConvertTexture(blitter, guest_address, x, y, width, height, format,
swap_channels, src_texture);
}
GLuint TextureCache::ConvertTexture(Blitter* blitter, uint32_t guest_address,
uint32_t x, uint32_t y, uint32_t width,
uint32_t height, TextureFormat format,
bool swap_channels, GLuint src_texture) {
const auto& config = texture_configs[uint32_t(format)];
if (config.format == GL_INVALID_ENUM) {
assert_always("Unhandled destination texture format");
return 0;
}
// See if we have used a texture at this address before. If we have, we can // See if we have used a texture at this address before. If we have, we can
// reuse it. // reuse it.
// TODO(benvanik): better lookup matching format/etc? // TODO(benvanik): better lookup matching format/etc?
@ -538,8 +551,14 @@ GLuint TextureCache::CopyReadBufferTexture(uint32_t guest_address, uint32_t x,
if (texture_entry) { if (texture_entry) {
// Have existing texture. // Have existing texture.
assert_false(texture_entry->pending_invalidation); assert_false(texture_entry->pending_invalidation);
glCopyTextureSubImage2D(texture_entry->handle, 0, 0, 0, x, y, width, if (config.format == GL_DEPTH_STENCIL) {
height); blitter->CopyDepthTexture(src_texture, x, y, width, height,
texture_entry->handle, 0, 0, width, height);
} else {
blitter->CopyColorTexture2D(src_texture, x, y, width, height,
texture_entry->handle, 0, 0, width, height,
GL_LINEAR);
}
// HACK: remove texture from write watch list so readback won't kill us. // HACK: remove texture from write watch list so readback won't kill us.
if (texture_entry->write_watch_handle) { if (texture_entry->write_watch_handle) {
@ -557,17 +576,18 @@ GLuint TextureCache::CopyReadBufferTexture(uint32_t guest_address, uint32_t x,
if (entry->guest_address == guest_address && entry->width == width && if (entry->guest_address == guest_address && entry->width == width &&
entry->height == height && entry->format == format) { entry->height == height && entry->format == format) {
// Found an existing entry - just reupload. // Found an existing entry - just reupload.
glCopyTextureSubImage2D(entry->handle, 0, 0, 0, x, y, width, height); if (config.format == GL_DEPTH_STENCIL) {
blitter->CopyDepthTexture(src_texture, x, y, width, height,
entry->handle, 0, 0, width, height);
} else {
blitter->CopyColorTexture2D(src_texture, x, y, width, height,
entry->handle, 0, 0, width, height,
GL_LINEAR);
}
return entry->handle; return entry->handle;
} }
} }
const auto& config = texture_configs[uint32_t(format)];
if (config.format == GL_INVALID_ENUM) {
assert_always("Unhandled destination texture format");
return 0;
}
// Need to create a new texture. // Need to create a new texture.
// As we don't know anything about this texture, we'll add it to the // As we don't know anything about this texture, we'll add it to the
// pending readbuffer list. If nobody claims it after a certain amount // pending readbuffer list. If nobody claims it after a certain amount
@ -582,7 +602,13 @@ GLuint TextureCache::CopyReadBufferTexture(uint32_t guest_address, uint32_t x,
glTextureParameteri(entry->handle, GL_TEXTURE_BASE_LEVEL, 0); glTextureParameteri(entry->handle, GL_TEXTURE_BASE_LEVEL, 0);
glTextureParameteri(entry->handle, GL_TEXTURE_MAX_LEVEL, 1); glTextureParameteri(entry->handle, GL_TEXTURE_MAX_LEVEL, 1);
glTextureStorage2D(entry->handle, 1, config.internal_format, width, height); glTextureStorage2D(entry->handle, 1, config.internal_format, width, height);
glCopyTextureSubImage2D(entry->handle, 0, 0, 0, x, y, width, height); if (config.format == GL_DEPTH_STENCIL) {
blitter->CopyDepthTexture(src_texture, x, y, width, height, entry->handle,
0, 0, width, height);
} else {
blitter->CopyColorTexture2D(src_texture, x, y, width, height, entry->handle,
0, 0, width, height, GL_LINEAR);
}
GLuint handle = entry->handle; GLuint handle = entry->handle;
read_buffer_textures_.push_back(entry.release()); read_buffer_textures_.push_back(entry.release());

13
src/xenia/gpu/gl4/texture_cache.h
View File

@ -14,6 +14,7 @@
#include <unordered_map> #include <unordered_map>
#include <vector> #include <vector>
#include "xenia/gpu/gl4/blitter.h"
#include "xenia/gpu/gl4/circular_buffer.h" #include "xenia/gpu/gl4/circular_buffer.h"
#include "xenia/gpu/gl4/gl_context.h" #include "xenia/gpu/gl4/gl_context.h"
#include "xenia/gpu/sampler_info.h" #include "xenia/gpu/sampler_info.h"
@ -57,9 +58,15 @@ class TextureCache {
TextureEntryView* Demand(const TextureInfo& texture_info, TextureEntryView* Demand(const TextureInfo& texture_info,
const SamplerInfo& sampler_info); const SamplerInfo& sampler_info);
GLuint CopyReadBufferTexture(uint32_t guest_address, uint32_t x, uint32_t y,
uint32_t width, uint32_t height, GLuint CopyTexture(Blitter* blitter, uint32_t guest_address, uint32_t x,
TextureFormat format, bool swap_channels); uint32_t y, uint32_t width, uint32_t height,
TextureFormat format, bool swap_channels,
GLuint src_texture);
GLuint ConvertTexture(Blitter* blitter, uint32_t guest_address, uint32_t x,
uint32_t y, uint32_t width, uint32_t height,
TextureFormat format, bool swap_channels,
GLuint src_texture);
private: private:
struct ReadBufferTexture { struct ReadBufferTexture {