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0032461: Visualization - expensive call of glGetTexEnviv/glTexEnvi in each render of OpenGl_Text

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- removed the call of glGetTexEnviv, glTexEnvi
 - replaced on the OpenGl_Sampler::applyGlobalTextureParams/resetGlobalTextureParams
 - added the method in OpenGl_Font returning first texture
This commit is contained in:
sshutina 2021-09-15 13:48:51 +03:00 committed by smoskvin
parent 7c6fecf9a8
commit 58f2990bc5
3 changed files with 14 additions and 11 deletions
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6
src/OpenGl/OpenGl_Font.hxx
View File

@ -114,6 +114,12 @@ public:
const Standard_Utf32Char theUChar,
Tile& theGlyph);
//! @return first texture.
const Handle(OpenGl_Texture)& Texture() const
{
return myTextures.First();
}
protected:
//! Render new glyph to the texture.

1
src/OpenGl/OpenGl_Sampler.hxx
View File

@ -27,6 +27,7 @@ class OpenGl_Sampler : public OpenGl_Resource
{
friend class OpenGl_Context;
friend class OpenGl_Texture;
friend class OpenGl_Text;
DEFINE_STANDARD_RTTIEXT(OpenGl_Sampler, OpenGl_Resource)
public:

18
src/OpenGl/OpenGl_Text.cxx
View File

@ -16,6 +16,7 @@
#include <OpenGl_Aspects.hxx>
#include <OpenGl_GlCore11.hxx>
#include <OpenGl_GraphicDriver.hxx>
#include <OpenGl_Sampler.hxx>
#include <OpenGl_ShaderManager.hxx>
#include <OpenGl_ShaderProgram.hxx>
#include <OpenGl_ShaderStates.hxx>
@ -780,16 +781,10 @@ void OpenGl_Text::render (const Handle(OpenGl_Context)& theCtx,
}
#if !defined(GL_ES_VERSION_2_0)
// activate texture unit
GLint aTexEnvParam = GL_REPLACE;
if (theCtx->core11ffp != NULL)
if (theCtx->core11ffp != NULL && theCtx->ActiveProgram().IsNull())
{
theCtx->core11fwd->glDisable (GL_TEXTURE_1D);
theCtx->core11fwd->glEnable (GL_TEXTURE_2D);
theCtx->core11ffp->glGetTexEnviv (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, &aTexEnvParam);
if (aTexEnvParam != GL_REPLACE)
{
theCtx->core11ffp->glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
const Handle(OpenGl_Texture)& aTexture = myFont->Texture();
OpenGl_Sampler::applyGlobalTextureParams (theCtx, *aTexture, aTexture->Sampler()->Parameters());
}
#endif
@ -861,9 +856,10 @@ void OpenGl_Text::render (const Handle(OpenGl_Context)& theCtx,
}
#if !defined(GL_ES_VERSION_2_0)
if (theCtx->core11ffp != NULL)
if (theCtx->core11ffp != NULL && theCtx->ActiveProgram().IsNull())
{
theCtx->core11ffp->glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, aTexEnvParam);
const Handle(OpenGl_Texture)& aTexture = myFont->Texture();
OpenGl_Sampler::resetGlobalTextureParams (theCtx, *aTexture, aTexture->Sampler()->Parameters());
}
#endif