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Attempt to emulate luminance textures as they're quite common still.

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* I emulate luminance textures as either GL_RED or GL_RG textures of
  appropriate size, and use the built-in texture swizzling to shunt the
  channels around.
* At the moment, I don't handle further swizzling of the textures (which
  would break the fake layer) as I assume legacy code using luminance texs
  wouldn't use swizzling also, but instead would just update and use the
  appropriate formats themselves.
* The same applies for render buffers, texture views, texture buffers and
  glTexStorage* calls - not handled at the moment, but wouldn't be hard to.
This commit is contained in:
baldurk
2014-12-25 21:16:33 +00:00
parent a9092dd199
commit 47005da118
3 changed files with 81 additions and 1 deletions
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renderdoc/driver/gl/gl_resources.cpp
+73 -1
View File
@@ -25,6 +25,10 @@
#include "gl_hookset.h"
#include "gl_resources.h"
// no longer in glcorearb.h or glext.h
const GLenum eGL_LUMINANCE = (GLenum)0x1909;
const GLenum eGL_LUMINANCE_ALPHA = (GLenum)0x190A;
size_t GetByteSize(GLsizei w, GLsizei h, GLsizei d, GLenum format, GLenum type, int align)
{
size_t elemSize = 0;
@@ -103,7 +107,7 @@ size_t GetByteSize(GLsizei w, GLsizei h, GLsizei d, GLenum format, GLenum type,
break;
}
switch(format)
switch((int)format)
{
case eGL_RED:
case eGL_RED_INTEGER:
@@ -111,11 +115,13 @@ size_t GetByteSize(GLsizei w, GLsizei h, GLsizei d, GLenum format, GLenum type,
case eGL_GREEN_INTEGER:
case eGL_BLUE:
case eGL_BLUE_INTEGER:
case eGL_LUMINANCE:
case eGL_DEPTH_COMPONENT:
case eGL_STENCIL_INDEX:
return ((w*elemSize + alignAdd) & alignMask)*h*d;
case eGL_RG:
case eGL_RG_INTEGER:
case eGL_LUMINANCE_ALPHA:
case eGL_DEPTH_STENCIL:
return ((w*elemSize*2 + alignAdd) & alignMask)*h*d;
case eGL_RGB:
@@ -456,6 +462,72 @@ GLenum GetSizedFormat(const GLHookSet &gl, GLenum target, GLenum internalFormat)
return internalFormat;
}
void EmulateLuminanceFormat(const GLHookSet &gl, GLuint tex, GLenum target, GLenum &internalFormat, GLenum &dataFormat)
{
GLenum swizzle[] = { eGL_RED, eGL_GREEN, eGL_BLUE, eGL_ALPHA };
bool dataFormatLum = (dataFormat == eGL_LUMINANCE || dataFormat == eGL_LUMINANCE_ALPHA);
switch((int)internalFormat)
{
case eGL_LUMINANCE:
case eGL_LUMINANCE8_EXT:
internalFormat = eGL_R8;
if(dataFormatLum) dataFormat = eGL_RED;
swizzle[0] = swizzle[1] = swizzle[2] = eGL_RED;
break;
case eGL_SLUMINANCE8_EXT:
internalFormat = eGL_SRGB8;
if(dataFormatLum) dataFormat = eGL_RED;
swizzle[0] = swizzle[1] = swizzle[2] = eGL_RED;
break;
case eGL_LUMINANCE16_EXT:
internalFormat = eGL_R16;
if(dataFormatLum) dataFormat = eGL_RED;
swizzle[0] = swizzle[1] = swizzle[2] = eGL_RED;
break;
case eGL_LUMINANCE32F_ARB:
internalFormat = eGL_R32F;
if(dataFormatLum) dataFormat = eGL_RED;
swizzle[0] = swizzle[1] = swizzle[2] = eGL_RED;
break;
case eGL_LUMINANCE32I_EXT:
internalFormat = eGL_R32I;
if(dataFormatLum) dataFormat = eGL_RED;
swizzle[0] = swizzle[1] = swizzle[2] = eGL_RED;
break;
case eGL_LUMINANCE32UI_EXT:
internalFormat = eGL_R32UI;
if(dataFormatLum) dataFormat = eGL_RED;
swizzle[0] = swizzle[1] = swizzle[2] = eGL_RED;
break;
case eGL_LUMINANCE_ALPHA:
case eGL_LUMINANCE8_ALPHA8_EXT:
internalFormat = eGL_RG8;
if(dataFormatLum) dataFormat = eGL_RG;
swizzle[0] = swizzle[1] = swizzle[2] = eGL_RED;
swizzle[3] = eGL_GREEN;
break;
case eGL_SLUMINANCE8_ALPHA8_EXT:
internalFormat = eGL_SRGB8_ALPHA8;
if(dataFormatLum) dataFormat = eGL_RG;
swizzle[0] = swizzle[1] = swizzle[2] = eGL_RED;
swizzle[3] = eGL_GREEN;
break;
case eGL_LUMINANCE16_ALPHA16_EXT:
internalFormat = eGL_RG16;
if(dataFormatLum) dataFormat = eGL_RG;
swizzle[0] = swizzle[1] = swizzle[2] = eGL_RED;
swizzle[3] = eGL_GREEN;
break;
default:
return;
}
if(tex)
gl.glTextureParameterivEXT(tex, target, eGL_TEXTURE_SWIZZLE_RGBA, (GLint *)swizzle);
}
bool IsCompressedFormat(GLenum internalFormat)
{
switch(internalFormat)
renderdoc/driver/gl/gl_resources.h
+2
View File
@@ -36,6 +36,8 @@ GLenum GetBaseFormat(GLenum internalFormat);
GLenum GetDataType(GLenum internalFormat);
GLenum GetSizedFormat(const GLHookSet &gl, GLenum target, GLenum internalFormat);
void EmulateLuminanceFormat(const GLHookSet &gl, GLuint tex, GLenum target, GLenum &internalFormat, GLenum &dataFormat);
int GetNumMips(const GLHookSet &gl, GLenum target, GLuint tex, GLuint w, GLuint h, GLuint d);
bool IsCompressedFormat(GLenum internalFormat);
renderdoc/driver/gl/wrappers/gl_texture_funcs.cpp
+6
View File
@@ -1696,6 +1696,8 @@ bool WrappedOpenGL::Serialise_glTextureImage1DEXT(GLuint texture, GLenum target,
if(m_State == READING)
{
EmulateLuminanceFormat(m_Real, GetResourceManager()->GetLiveResource(id).name, Target, IntFormat, Format);
if(Level == 0) // assume level 0 will always get a glTexImage call
{
ResourceId liveId = GetResourceManager()->GetLiveID(id);
@@ -1929,6 +1931,8 @@ bool WrappedOpenGL::Serialise_glTextureImage2DEXT(GLuint texture, GLenum target,
if(m_State == READING)
{
EmulateLuminanceFormat(m_Real, GetResourceManager()->GetLiveResource(id).name, Target, IntFormat, Format);
if(Level == 0) // assume level 0 will always get a glTexImage call
{
ResourceId liveId = GetResourceManager()->GetLiveID(id);
@@ -2169,6 +2173,8 @@ bool WrappedOpenGL::Serialise_glTextureImage3DEXT(GLuint texture, GLenum target,
if(m_State == READING)
{
EmulateLuminanceFormat(m_Real, GetResourceManager()->GetLiveResource(id).name, Target, IntFormat, Format);
if(Level == 0) // assume level 0 will always get a glTexImage call
{
ResourceId liveId = GetResourceManager()->GetLiveID(id);