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Optimise a little when using OpenGL3

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This commit is contained in:
Clownacy 2020-09-17 18:15:24 +01:00
parent b8ceefcefd
commit 5c6b71e3a1
1 changed files with 24 additions and 15 deletions
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39
src/Backends/Rendering/OpenGL3.cpp
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@ -933,25 +933,34 @@ void RenderBackend_DestroyGlyphAtlas(RenderBackend_GlyphAtlas *atlas)
void RenderBackend_UploadGlyph(RenderBackend_GlyphAtlas *atlas, size_t x, size_t y, const unsigned char *pixels, size_t width, size_t height, size_t pitch)
{
#ifdef USE_OPENGLES2
unsigned char *buffer = (unsigned char*)malloc(width * height);
if (buffer != NULL)
{
for (size_t y = 0; y < height; ++y)
memcpy (&buffer[y * width], &pixels[y * pitch], width);
if (buffer == NULL)
return;
SetTextureUploadAlignment(width);
glBindTexture(GL_TEXTURE_2D, atlas->texture_id);
#ifdef USE_OPENGLES2
glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, GL_LUMINANCE, GL_UNSIGNED_BYTE, buffer);
#else
glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, GL_RED, GL_UNSIGNED_BYTE, buffer);
#endif
glBindTexture(GL_TEXTURE_2D, last_source_texture);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
for (size_t y = 0; y < height; ++y)
memcpy (&buffer[y * width], &pixels[y * pitch], width);
#else
const unsigned char *buffer = pixels;
free(buffer);
}
glPixelStorei(GL_UNPACK_ROW_LENGTH, pitch);
#endif
SetTextureUploadAlignment(width);
glBindTexture(GL_TEXTURE_2D, atlas->texture_id);
#ifdef USE_OPENGLES2
glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, GL_LUMINANCE, GL_UNSIGNED_BYTE, buffer);
#else
glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, GL_RED, GL_UNSIGNED_BYTE, buffer);
#endif
glBindTexture(GL_TEXTURE_2D, last_source_texture);
#ifdef USE_OPENGLES2
free(buffer);
#else
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
#endif
}
void RenderBackend_PrepareToDrawGlyphs(RenderBackend_GlyphAtlas *atlas, RenderBackend_Surface *destination_surface, unsigned char red, unsigned char green, unsigned char blue)