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Update rlgl.h

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Added rlWriteTexturePixels, whitch is rlReadTexturePixels implementation without internal memory allocations
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KhanKotyano 2025-02-15 07:02:46 +05:00 committed by GitHub
parent c647d33703
commit 557eb5d6c0
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1 changed files with 33 additions and 0 deletions
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33
src/rlgl.h
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@ -760,6 +760,7 @@ RLAPI const char *rlGetPixelFormatName(unsigned int format); // Get
RLAPI void rlUnloadTexture(unsigned int id); // Unload texture from GPU memory
RLAPI void rlGenTextureMipmaps(unsigned int id, int width, int height, int format, int *mipmaps); // Generate mipmap data for selected texture
RLAPI void *rlReadTexturePixels(unsigned int id, int width, int height, int format); // Read texture pixel data
RLAPI void rlWriteTexturePixels(unsigned int id, int width, int height, int format, void *pixels); // Write texture pixel data to a buffer (rlReadTexturePixels without malloc)
RLAPI unsigned char *rlReadScreenPixels(int width, int height); // Read screen pixel data (color buffer)
// Framebuffer management (fbo)
@ -3672,6 +3673,38 @@ void *rlReadTexturePixels(unsigned int id, int width, int height, int format)
return pixels;
}
//rlReadTexturePixels implementation without malloc
void rlWriteTexturePixels(unsigned int id, int width, int height, int format, void *pixels)
{
if(pixels == NULL){
TRACELOG(RL_LOG_WARNING, "TEXTURE: [ID %i] Attempt to write texture data to a null pointer", id, format);
return;
}
#if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33)
glBindTexture(GL_TEXTURE_2D, id);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
unsigned int glInternalFormat, glFormat, glType;
rlGetGlTextureFormats(format, &glInternalFormat, &glFormat, &glType);
unsigned int size = rlGetPixelDataSize(width, height, format);
if ((glInternalFormat != 0) && (format < RL_PIXELFORMAT_COMPRESSED_DXT1_RGB))
{
glGetTexImage(GL_TEXTURE_2D, 0, glFormat, glType, pixels);
}
else TRACELOG(RL_LOG_WARNING, "TEXTURE: [ID %i] Data retrieval not suported for pixel format (%i)", id, format);
glBindTexture(GL_TEXTURE_2D, 0);
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
unsigned int fboId = rlLoadFramebuffer();
glBindFramebuffer(GL_FRAMEBUFFER, fboId);
glBindTexture(GL_TEXTURE_2D, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, id, 0);
glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, (unsigned char *)pixels);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
rlUnloadFramebuffer(fboId);
#endif
}
// Read screen pixel data (color buffer)
unsigned char *rlReadScreenPixels(int width, int height)