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Support 16-Bit HDR textures (#3220)
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* Support 16-Bit HDR textures

* Fix build on emscripten

* Move helper functions
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@Not-Nik
Not-Nik authored Aug 5, 2023
1 parent 6094869 commit dc621ca
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Showing 3 changed files with 238 additions and 12 deletions.
3 changes: 3 additions & 0 deletions src/raylib.h
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Original file line number Diff line number Diff line change
Expand Up @@ -812,6 +812,9 @@ typedef enum {
PIXELFORMAT_UNCOMPRESSED_R32, // 32 bpp (1 channel - float)
PIXELFORMAT_UNCOMPRESSED_R32G32B32, // 32*3 bpp (3 channels - float)
PIXELFORMAT_UNCOMPRESSED_R32G32B32A32, // 32*4 bpp (4 channels - float)
PIXELFORMAT_UNCOMPRESSED_R16, // 16 bpp (1 channel - half float)
PIXELFORMAT_UNCOMPRESSED_R16G16B16, // 16*3 bpp (3 channels - half float)
PIXELFORMAT_UNCOMPRESSED_R16G16B16A16, // 16*4 bpp (4 channels - half float)
PIXELFORMAT_COMPRESSED_DXT1_RGB, // 4 bpp (no alpha)
PIXELFORMAT_COMPRESSED_DXT1_RGBA, // 4 bpp (1 bit alpha)
PIXELFORMAT_COMPRESSED_DXT3_RGBA, // 8 bpp
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39 changes: 29 additions & 10 deletions src/rlgl.h
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Original file line number Diff line number Diff line change
Expand Up @@ -419,6 +419,9 @@ typedef enum {
RL_PIXELFORMAT_UNCOMPRESSED_R32, // 32 bpp (1 channel - float)
RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32, // 32*3 bpp (3 channels - float)
RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32A32, // 32*4 bpp (4 channels - float)
RL_PIXELFORMAT_UNCOMPRESSED_R16, // 16 bpp (1 channel - half float)
RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16, // 16*3 bpp (3 channels - half float)
RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16A16, // 16*4 bpp (4 channels - half float)
RL_PIXELFORMAT_COMPRESSED_DXT1_RGB, // 4 bpp (no alpha)
RL_PIXELFORMAT_COMPRESSED_DXT1_RGBA, // 4 bpp (1 bit alpha)
RL_PIXELFORMAT_COMPRESSED_DXT3_RGBA, // 8 bpp
Expand Down Expand Up @@ -1006,6 +1009,7 @@ typedef struct rlglData {
bool texDepth; // Depth textures supported (GL_ARB_depth_texture, GL_OES_depth_texture)
bool texDepthWebGL; // Depth textures supported WebGL specific (GL_WEBGL_depth_texture)
bool texFloat32; // float textures support (32 bit per channel) (GL_OES_texture_float)
bool texFloat16; // half float textures support (16 bit per channel) (GL_OES_texture_half_float)
bool texCompDXT; // DDS texture compression support (GL_EXT_texture_compression_s3tc, GL_WEBGL_compressed_texture_s3tc, GL_WEBKIT_WEBGL_compressed_texture_s3tc)
bool texCompETC1; // ETC1 texture compression support (GL_OES_compressed_ETC1_RGB8_texture, GL_WEBGL_compressed_texture_etc1)
bool texCompETC2; // ETC2/EAC texture compression support (GL_ARB_ES3_compatibility)
Expand Down Expand Up @@ -2189,6 +2193,7 @@ void rlLoadExtensions(void *loader)
RLGL.ExtSupported.instancing = (GLAD_GL_EXT_draw_instanced && GLAD_GL_ARB_instanced_arrays);
RLGL.ExtSupported.texNPOT = GLAD_GL_ARB_texture_non_power_of_two;
RLGL.ExtSupported.texFloat32 = GLAD_GL_ARB_texture_float;
RLGL.ExtSupported.texFloat16 = GLAD_GL_ARB_texture_float;
RLGL.ExtSupported.texDepth = GLAD_GL_ARB_depth_texture;
RLGL.ExtSupported.maxDepthBits = 32;
RLGL.ExtSupported.texAnisoFilter = GLAD_GL_EXT_texture_filter_anisotropic;
Expand All @@ -2200,6 +2205,7 @@ void rlLoadExtensions(void *loader)
RLGL.ExtSupported.instancing = true;
RLGL.ExtSupported.texNPOT = true;
RLGL.ExtSupported.texFloat32 = true;
RLGL.ExtSupported.texFloat16 = true;
RLGL.ExtSupported.texDepth = true;
RLGL.ExtSupported.maxDepthBits = 32;
RLGL.ExtSupported.texAnisoFilter = true;
Expand All @@ -2224,6 +2230,7 @@ void rlLoadExtensions(void *loader)
RLGL.ExtSupported.instancing = true;
RLGL.ExtSupported.texNPOT = true;
RLGL.ExtSupported.texFloat32 = true;
RLGL.ExtSupported.texFloat16 = true;
RLGL.ExtSupported.texDepth = true;
RLGL.ExtSupported.texDepthWebGL = true;
RLGL.ExtSupported.maxDepthBits = 24;
Expand Down Expand Up @@ -2320,6 +2327,7 @@ void rlLoadExtensions(void *loader)

// Check texture float support
if (strcmp(extList[i], (const char *)"GL_OES_texture_float") == 0) RLGL.ExtSupported.texFloat32 = true;
if (strcmp(extList[i], (const char *)"GL_OES_texture_half_float") == 0) RLGL.ExtSupported.texFloat16 = true;

// Check depth texture support
if (strcmp(extList[i], (const char *)"GL_OES_depth_texture") == 0) RLGL.ExtSupported.texDepth = true;
Expand Down Expand Up @@ -3163,13 +3171,9 @@ unsigned int rlLoadTextureCubemap(const void *data, int size, int format)
{
if (format < RL_PIXELFORMAT_COMPRESSED_DXT1_RGB)
{
if (format == RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32)
{
// Instead of using a sized internal texture format (GL_RGB16F, GL_RGB32F), we let the driver to choose the better format for us (GL_RGB)
if (RLGL.ExtSupported.texFloat32) glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, size, size, 0, GL_RGB, GL_FLOAT, NULL);
else TRACELOG(RL_LOG_WARNING, "TEXTURES: Cubemap requested format not supported");
}
else if ((format == RL_PIXELFORMAT_UNCOMPRESSED_R32) || (format == RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32A32)) TRACELOG(RL_LOG_WARNING, "TEXTURES: Cubemap requested format not supported");
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 TRACELOG(RL_LOG_WARNING, "TEXTURES: Empty cubemap creation does not support compressed format");
Expand Down Expand Up @@ -3256,10 +3260,16 @@ void rlGetGlTextureFormats(int format, unsigned int *glInternalFormat, unsigned
case RL_PIXELFORMAT_UNCOMPRESSED_R32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_R32F_EXT; *glFormat = GL_RED_EXT; *glType = GL_FLOAT; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGB32F_EXT; *glFormat = GL_RGB; *glType = GL_FLOAT; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGBA32F_EXT; *glFormat = GL_RGBA; *glType = GL_FLOAT; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R16: if (RLGL.ExtSupported.texFloat16) *glInternalFormat = GL_R16F_EXT; *glFormat = GL_RED_EXT; *glType = GL_HALF_FLOAT; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16: if (RLGL.ExtSupported.texFloat16) *glInternalFormat = GL_RGB16F_EXT; *glFormat = GL_RGB; *glType = GL_HALF_FLOAT; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16A16: if (RLGL.ExtSupported.texFloat16) *glInternalFormat = GL_RGBA16F_EXT; *glFormat = GL_RGBA; *glType = GL_HALF_FLOAT; break;
#else
case RL_PIXELFORMAT_UNCOMPRESSED_R32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_LUMINANCE; *glFormat = GL_LUMINANCE; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGB; *glFormat = GL_RGB; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float
case RL_PIXELFORMAT_UNCOMPRESSED_R32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_LUMINANCE; *glFormat = GL_LUMINANCE; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGB; *glFormat = GL_RGB; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float
case RL_PIXELFORMAT_UNCOMPRESSED_R16: if (RLGL.ExtSupported.texFloat16) *glInternalFormat = GL_LUMINANCE; *glFormat = GL_LUMINANCE; *glType = GL_HALF_FLOAT_OES; break; // NOTE: Requires extension OES_texture_half_float
case RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16: if (RLGL.ExtSupported.texFloat16) *glInternalFormat = GL_RGB; *glFormat = GL_RGB; *glType = GL_HALF_FLOAT_OES; break; // NOTE: Requires extension OES_texture_half_float
case RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16A16: if (RLGL.ExtSupported.texFloat16) *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_HALF_FLOAT_OES; break; // NOTE: Requires extension OES_texture_half_float
#endif
#endif
#elif defined(GRAPHICS_API_OPENGL_33)
Expand All @@ -3273,6 +3283,9 @@ void rlGetGlTextureFormats(int format, unsigned int *glInternalFormat, unsigned
case RL_PIXELFORMAT_UNCOMPRESSED_R32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_R32F; *glFormat = GL_RED; *glType = GL_FLOAT; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGB32F; *glFormat = GL_RGB; *glType = GL_FLOAT; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGBA32F; *glFormat = GL_RGBA; *glType = GL_FLOAT; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R16: if (RLGL.ExtSupported.texFloat16) *glInternalFormat = GL_R16F; *glFormat = GL_RED; *glType = GL_HALF_FLOAT; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16: if (RLGL.ExtSupported.texFloat16) *glInternalFormat = GL_RGB16F; *glFormat = GL_RGB; *glType = GL_HALF_FLOAT; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16A16: if (RLGL.ExtSupported.texFloat16) *glInternalFormat = GL_RGBA16F; *glFormat = GL_RGBA; *glType = GL_HALF_FLOAT; break;
#endif
#if !defined(GRAPHICS_API_OPENGL_11)
case RL_PIXELFORMAT_COMPRESSED_DXT1_RGB: if (RLGL.ExtSupported.texCompDXT) *glInternalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT; break;
Expand Down Expand Up @@ -4480,6 +4493,9 @@ const char *rlGetPixelFormatName(unsigned int format)
case RL_PIXELFORMAT_UNCOMPRESSED_R32: return "R32"; break; // 32 bpp (1 channel - float)
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32: return "R32G32B32"; break; // 32*3 bpp (3 channels - float)
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: return "R32G32B32A32"; break; // 32*4 bpp (4 channels - float)
case RL_PIXELFORMAT_UNCOMPRESSED_R16: return "R16"; break; // 16 bpp (1 channel - half float)
case RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16: return "R16G16B16"; break; // 16*3 bpp (3 channels - half float)
case RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16A16: return "R16G16B16A16"; break; // 16*4 bpp (4 channels - half float)
case RL_PIXELFORMAT_COMPRESSED_DXT1_RGB: return "DXT1_RGB"; break; // 4 bpp (no alpha)
case RL_PIXELFORMAT_COMPRESSED_DXT1_RGBA: return "DXT1_RGBA"; break; // 4 bpp (1 bit alpha)
case RL_PIXELFORMAT_COMPRESSED_DXT3_RGBA: return "DXT3_RGBA"; break; // 8 bpp
Expand Down Expand Up @@ -4721,6 +4737,9 @@ static int rlGetPixelDataSize(int width, int height, int format)
case RL_PIXELFORMAT_UNCOMPRESSED_R32: bpp = 32; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32: bpp = 32*3; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: bpp = 32*4; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R16: bpp = 16; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16: bpp = 16*3; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16A16: bpp = 16*4; break;
case RL_PIXELFORMAT_COMPRESSED_DXT1_RGB:
case RL_PIXELFORMAT_COMPRESSED_DXT1_RGBA:
case RL_PIXELFORMAT_COMPRESSED_ETC1_RGB:
Expand Down
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