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[rtextures/rlgl] Load mipmaps for cubemaps (#4429)

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* [rlgl] Load cubemap mipmaps

* [rtextures] Only generate mipmaps that don't already exist

* [rtextures] ImageDraw(): Implement drawing to mipmaps

* [rtextures] Load cubemap mipmaps
This commit is contained in:
Nikolas
2024-10-26 12:09:38 +02:00
committed by GitHub
parent 91a4f04794
commit 7fedf9e0b8
3 changed files with 78 additions and 20 deletions
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39
src/rlgl.h
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@@ -749,7 +749,7 @@ RLAPI void rlDrawVertexArrayElementsInstanced(int offset, int count, const void
// Textures management
RLAPI unsigned int rlLoadTexture(const void *data, int width, int height, int format, int mipmapCount); // Load texture data
RLAPI unsigned int rlLoadTextureDepth(int width, int height, bool useRenderBuffer); // Load depth texture/renderbuffer (to be attached to fbo)
RLAPI unsigned int rlLoadTextureCubemap(const void *data, int size, int format); // Load texture cubemap data
RLAPI unsigned int rlLoadTextureCubemap(const void *data, int size, int format, int mipmapCount); // Load texture cubemap data
RLAPI void rlUpdateTexture(unsigned int id, int offsetX, int offsetY, int width, int height, int format, const void *data); // Update texture with new data on GPU
RLAPI void rlGetGlTextureFormats(int format, unsigned int *glInternalFormat, unsigned int *glFormat, unsigned int *glType); // Get OpenGL internal formats
RLAPI const char *rlGetPixelFormatName(unsigned int format); // Get name string for pixel format
@@ -3386,11 +3386,17 @@ unsigned int rlLoadTextureDepth(int width, int height, bool useRenderBuffer)
// Load texture cubemap
// NOTE: Cubemap data is expected to be 6 images in a single data array (one after the other),
// expected the following convention: +X, -X, +Y, -Y, +Z, -Z
unsigned int rlLoadTextureCubemap(const void *data, int size, int format)
unsigned int rlLoadTextureCubemap(const void *data, int size, int format, int mipmapCount)
{
unsigned int id = 0;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
int mipSize = size;
// NOTE: Added pointer math separately from function to avoid UBSAN complaining
unsigned char *dataPtr = NULL;
if (data != NULL) dataPtr = (unsigned char *)data;
unsigned int dataSize = rlGetPixelDataSize(size, size, format);
glGenTextures(1, &id);
@@ -3401,9 +3407,12 @@ unsigned int rlLoadTextureCubemap(const void *data, int size, int format)
if (glInternalFormat != 0)
{
// Load cubemap faces
for (unsigned int i = 0; i < 6; i++)
// Load cubemap faces/mipmaps
for (unsigned int i = 0; i < 6 * mipmapCount; i++)
{
int mipmapLevel = i / 6;
int face = i % 6;
if (data == NULL)
{
if (format < RL_PIXELFORMAT_COMPRESSED_DXT1_RGB)
@@ -3411,14 +3420,14 @@ unsigned int rlLoadTextureCubemap(const void *data, int size, int format)
if ((format == RL_PIXELFORMAT_UNCOMPRESSED_R32) || (format == RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32A32)
|| (format == RL_PIXELFORMAT_UNCOMPRESSED_R16) || (format == RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16A16))
TRACELOG(RL_LOG_WARNING, "TEXTURES: Cubemap requested format not supported");
else glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glInternalFormat, size, size, 0, glFormat, glType, NULL);
else glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, mipmapLevel, glInternalFormat, mipSize, mipSize, 0, glFormat, glType, NULL);
}
else TRACELOG(RL_LOG_WARNING, "TEXTURES: Empty cubemap creation does not support compressed format");
}
else
{
if (format < RL_PIXELFORMAT_COMPRESSED_DXT1_RGB) glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glInternalFormat, size, size, 0, glFormat, glType, (unsigned char *)data + i*dataSize);
else glCompressedTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glInternalFormat, size, size, 0, dataSize, (unsigned char *)data + i*dataSize);
if (format < RL_PIXELFORMAT_COMPRESSED_DXT1_RGB) glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, mipmapLevel, glInternalFormat, mipSize, mipSize, 0, glFormat, glType, (unsigned char *)dataPtr + face*dataSize);
else glCompressedTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, mipmapLevel, glInternalFormat, mipSize, mipSize, 0, dataSize, (unsigned char *)dataPtr + face*dataSize);
}
#if defined(GRAPHICS_API_OPENGL_33)
@@ -3437,11 +3446,25 @@ unsigned int rlLoadTextureCubemap(const void *data, int size, int format)
glTexParameteriv(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_SWIZZLE_RGBA, swizzleMask);
}
#endif
if (face == 5) {
mipSize /= 2;
if (data != NULL)
dataPtr += dataSize * 6; // Increment data pointer to next mipmap
// Security check for NPOT textures
if (mipSize < 1) mipSize = 1;
dataSize = rlGetPixelDataSize(mipSize, mipSize, format);
}
}
}
// Set cubemap texture sampling parameters
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
if (mipmapCount > 1) {
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
} else {
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);