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0032089: Visualization, TKOpenGl - support GL_EXT_sRGB extension to OpenGL ES 2.0

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This commit is contained in:
kgv
2021-01-29 11:12:01 +03:00
parent 4392c3391d
commit e3821dc440
4 changed files with 59 additions and 8 deletions
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13
src/OpenGl/OpenGl_Context.cxx
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@@ -1557,8 +1557,10 @@ void OpenGl_Context::init (const Standard_Boolean theIsCoreProfile)
hasTexRGBA8 = IsGlGreaterEqual (3, 0)
|| CheckExtension ("GL_OES_rgb8_rgba8");
hasTexSRGB = IsGlGreaterEqual (3, 0);
hasFboSRGB = IsGlGreaterEqual (3, 0);
hasTexSRGB = IsGlGreaterEqual (3, 0)
|| CheckExtension ("GL_EXT_sRGB");
hasFboSRGB = IsGlGreaterEqual (3, 0)
|| CheckExtension ("GL_EXT_sRGB");
hasFboRenderMipmap = IsGlGreaterEqual (3, 0)
|| CheckExtension ("GL_OES_fbo_render_mipmap");
hasSRGBControl = CheckExtension ("GL_EXT_sRGB_write_control");
@@ -3355,8 +3357,15 @@ void OpenGl_Context::init (const Standard_Boolean theIsCoreProfile)
GL_BACK;
#endif
GLint aWinColorEncoding = 0; // GL_LINEAR
bool toSkipCheck = false;
#ifdef __EMSCRIPTEN__
toSkipCheck = !IsGlGreaterEqual (3, 0);
#endif
if (!toSkipCheck)
{
arbFBO->glGetFramebufferAttachmentParameteriv (GL_FRAMEBUFFER, aDefWinBuffer, GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING, &aWinColorEncoding);
ResetErrors (true);
}
myIsSRgbWindow = aWinColorEncoding == GL_SRGB;
// On desktop OpenGL, pixel formats are almost always sRGB-ready, even when not requested;

4
src/OpenGl/OpenGl_GLESExtensions.hxx
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@@ -33,6 +33,10 @@ typedef double GLclampd;
// GL_EXT_texture_format_BGRA8888
#define GL_BGRA_EXT 0x80E1 // same as GL_BGRA on desktop
// GL_EXT_sRGB
#define GL_SRGB_EXT 0x8C40 // GL_SRGB_EXT
#define GL_SRGB_ALPHA_EXT 0x8C42 // GL_SRGB_ALPHA_EXT
#define GL_R16 0x822A
#define GL_RGB4 0x804F
#define GL_RGB5 0x8050

20
src/OpenGl/OpenGl_Texture.cxx
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@@ -1012,6 +1012,20 @@ bool OpenGl_Texture::InitCubeMap (const Handle(OpenGl_Context)& theCtx,
return false;
}
#if defined(GL_ES_VERSION_2_0)
if (theToGenMipmap
&& !theCtx->IsGlGreaterEqual (3, 0)
&& (aFormat.PixelFormat() == GL_SRGB_EXT
|| aFormat.PixelFormat() == GL_SRGB_ALPHA_EXT))
{
theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH,
TCollection_AsciiString ("Warning, GL_EXT_sRGB disallows generation of mipmaps - fallback using non-sRGB format")
+ " [" + myResourceId +"]");
aFormat.SetPixelFormat (aFormat.PixelFormat() == GL_SRGB_EXT ? GL_RGB : GL_RGBA);
aFormat.SetInternalFormat(aFormat.PixelFormat() == GL_SRGB_EXT ? GL_RGB8 : GL_RGBA8);
}
#endif
myTarget = GL_TEXTURE_CUBE_MAP;
myNbSamples = 1;
mySizeX = (GLsizei )theSize;
@@ -1132,7 +1146,11 @@ bool OpenGl_Texture::InitCubeMap (const Handle(OpenGl_Context)& theCtx,
if (anErr != GL_NO_ERROR)
{
theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
TCollection_AsciiString ("Unable to initialize side of cubemap. Error ") + OpenGl_Context::FormatGlError (anErr));
TCollection_AsciiString ("Error: cubemap side ") + (int )theSize + "x" + (int )theSize
+ " IF: " + OpenGl_TextureFormat::FormatFormat (anIntFormat)
+ " PF: " + OpenGl_TextureFormat::FormatFormat (aFormat.PixelFormat())
+ " DT: " + OpenGl_TextureFormat::FormatDataType (aFormat.DataType())
+ " can not be created with error " + OpenGl_Context::FormatGlError (anErr) + ".");
Unbind (theCtx);
Release (theCtx.get());
return false;

24
src/OpenGl/OpenGl_TextureFormat.cxx
View File

@@ -46,6 +46,7 @@ TCollection_AsciiString OpenGl_TextureFormat::FormatFormat (GLint theInternalFor
case 0x8050: return "GL_RGB5";
case GL_RGB8: return "GL_RGB8";
case GL_SRGB8: return "GL_SRGB8";
case GL_SRGB_EXT: return "GL_SRGB_EXT";
case 0x8052: return "GL_RGB10";
case 0x8053: return "GL_RGB12";
case 0x8054: return "GL_RGB16";
@@ -56,6 +57,7 @@ TCollection_AsciiString OpenGl_TextureFormat::FormatFormat (GLint theInternalFor
case GL_RGBA: return "GL_RGBA";
case GL_RGBA8: return "GL_RGBA8";
case GL_SRGB8_ALPHA8: return "GL_SRGB8_ALPHA8";
case GL_SRGB_ALPHA_EXT: return "GL_SRGB_ALPHA_EXT";
case GL_RGB10_A2: return "GL_RGB10_A2";
case 0x805A: return "GL_RGBA12";
case 0x805B: return "GL_RGBA16";
@@ -254,6 +256,12 @@ OpenGl_TextureFormat OpenGl_TextureFormat::FindFormat (const Handle(OpenGl_Conte
if (theIsColorMap
&& theCtx->ToRenderSRGB())
{
#if defined(GL_ES_VERSION_2_0)
if (!theCtx->IsGlGreaterEqual (3, 0))
{
aFormat.SetPixelFormat (GL_SRGB_ALPHA_EXT);
}
#endif
aFormat.SetInternalFormat (GL_SRGB8_ALPHA8);
}
return aFormat;
@@ -308,6 +316,10 @@ OpenGl_TextureFormat OpenGl_TextureFormat::FindFormat (const Handle(OpenGl_Conte
if (theIsColorMap
&& theCtx->ToRenderSRGB())
{
if (!theCtx->IsGlGreaterEqual (3, 0))
{
aFormat.SetPixelFormat (GL_SRGB_ALPHA_EXT);
}
aFormat.SetInternalFormat (GL_SRGB8_ALPHA8);
}
#endif
@@ -355,6 +367,12 @@ OpenGl_TextureFormat OpenGl_TextureFormat::FindFormat (const Handle(OpenGl_Conte
if (theIsColorMap
&& theCtx->ToRenderSRGB())
{
#if defined(GL_ES_VERSION_2_0)
if (!theCtx->IsGlGreaterEqual (3, 0))
{
aFormat.SetPixelFormat (GL_SRGB_EXT);
}
#endif
aFormat.SetInternalFormat (GL_SRGB8);
}
return aFormat;
@@ -516,6 +534,7 @@ OpenGl_TextureFormat OpenGl_TextureFormat::FindSizedFormat (const Handle(OpenGl_
return aFormat;
}
case GL_SRGB8_ALPHA8:
case GL_SRGB_ALPHA_EXT:
case GL_RGBA8:
case GL_RGBA:
{
@@ -524,7 +543,7 @@ OpenGl_TextureFormat OpenGl_TextureFormat::FindSizedFormat (const Handle(OpenGl_
aFormat.SetPixelFormat (GL_RGBA);
aFormat.SetDataType (GL_UNSIGNED_BYTE);
aFormat.SetImageFormat (Image_Format_RGBA);
if (theSizedFormat == GL_SRGB8_ALPHA8
if ((theSizedFormat == GL_SRGB8_ALPHA8 || theSizedFormat == GL_SRGB_ALPHA_EXT)
&& !theCtx->ToRenderSRGB())
{
aFormat.SetInternalFormat (GL_RGBA8); // fallback format
@@ -532,6 +551,7 @@ OpenGl_TextureFormat OpenGl_TextureFormat::FindSizedFormat (const Handle(OpenGl_
return aFormat;
}
case GL_SRGB8:
case GL_SRGB_EXT:
case GL_RGB8:
case GL_RGB:
{
@@ -540,7 +560,7 @@ OpenGl_TextureFormat OpenGl_TextureFormat::FindSizedFormat (const Handle(OpenGl_
aFormat.SetPixelFormat (GL_RGB);
aFormat.SetDataType (GL_UNSIGNED_BYTE);
aFormat.SetImageFormat (Image_Format_RGB);
if (theSizedFormat == GL_SRGB8
if ((theSizedFormat == GL_SRGB8 || theSizedFormat == GL_SRGB_EXT)
&& !theCtx->ToRenderSRGB())
{
aFormat.SetInternalFormat (GL_RGB8); // fallback format