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GitHub Repository: hrydgard/ppsspp
 Path: blob/master/Common/GPU/OpenGL/DataFormatGL.cpp
Views: 1401
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#include "Common/GPU/OpenGL/DataFormatGL.h"

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#include "Common/GPU/OpenGL/GLFeatures.h"

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#include "Common/Log.h"

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namespace Draw {

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// TODO: Also output storage format (GL_RGBA8 etc) for modern GL usage.

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bool Thin3DFormatToGLFormatAndType(DataFormat fmt, GLuint &internalFormat, GLuint &format, GLuint &type, int &alignment) {

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	alignment = 4;

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	switch (fmt) {

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	case DataFormat::R16_UNORM:

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		internalFormat = GL_RGBA;

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		format = GL_RED;

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		type = GL_UNSIGNED_SHORT;

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		alignment = 2;

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		break;

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	case DataFormat::R8_UNORM:

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		if (gl_extensions.IsGLES) {

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			internalFormat = GL_LUMINANCE;

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			format = GL_LUMINANCE;

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		} else if (gl_extensions.VersionGEThan(3, 0)) {

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			internalFormat = GL_RED;

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			format = GL_RED;

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		} else {

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			internalFormat = GL_RGBA;

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			format = GL_RED;

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		}

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		type = GL_UNSIGNED_BYTE;

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		alignment = 1;

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		break;

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	case DataFormat::R8G8B8A8_UNORM:

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		internalFormat = GL_RGBA;

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		format = GL_RGBA;

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		type = GL_UNSIGNED_BYTE;

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		break;

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	case DataFormat::D32F:

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		internalFormat = GL_DEPTH_COMPONENT;

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		format = GL_DEPTH_COMPONENT;

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		type = GL_FLOAT;

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		break;

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#ifndef USING_GLES2

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	case DataFormat::S8:

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		internalFormat = GL_STENCIL_INDEX;

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		format = GL_STENCIL_INDEX;

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		type = GL_UNSIGNED_BYTE;

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		alignment = 1;

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		break;

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#endif

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	case DataFormat::R8G8B8_UNORM:

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		internalFormat = GL_RGB;

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		format = GL_RGB;

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		type = GL_UNSIGNED_BYTE;

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		alignment = 3;

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		break;

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	case DataFormat::R4G4B4A4_UNORM_PACK16:

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		internalFormat = GL_RGBA;

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		format = GL_RGBA;

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		type = GL_UNSIGNED_SHORT_4_4_4_4;

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		alignment = 2;

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		break;

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	case DataFormat::R5G6B5_UNORM_PACK16:

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		internalFormat = GL_RGB;

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		format = GL_RGB;

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		type = GL_UNSIGNED_SHORT_5_6_5;

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		alignment = 2;

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		break;

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	case DataFormat::R5G5B5A1_UNORM_PACK16:

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		internalFormat = GL_RGBA;

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		format = GL_RGBA;

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		type = GL_UNSIGNED_SHORT_5_5_5_1;

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		alignment = 2;

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		break;

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	case DataFormat::R32G32B32A32_FLOAT:

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		internalFormat = GL_RGBA32F;

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		format = GL_RGBA;

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		type = GL_FLOAT;

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		alignment = 16;

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		break;

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#ifndef USING_GLES2

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	case DataFormat::BC1_RGBA_UNORM_BLOCK:

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		internalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;

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		format = GL_RGB;

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		type = GL_FLOAT;

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		alignment = 8;

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		break;

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	case DataFormat::BC2_UNORM_BLOCK:

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		internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;

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		format = GL_RGBA;

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		type = GL_FLOAT;

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		alignment = 16;

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		break;

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	case DataFormat::BC3_UNORM_BLOCK:

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		internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;

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		format = GL_RGBA;

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		type = GL_FLOAT;

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		alignment = 16;

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		break;

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	case DataFormat::BC4_UNORM_BLOCK:

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		internalFormat = GL_COMPRESSED_RED_RGTC1;

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		format = GL_R;

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		type = GL_FLOAT;

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		alignment = 16;

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		break;

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	case DataFormat::BC5_UNORM_BLOCK:

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		internalFormat = GL_COMPRESSED_RG_RGTC2;

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		format = GL_RG;

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		type = GL_FLOAT;

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		alignment = 16;

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		break;

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	case DataFormat::BC7_UNORM_BLOCK:

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		internalFormat = GL_COMPRESSED_RGBA_BPTC_UNORM;

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		format = GL_RGBA;

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		type = GL_FLOAT;

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		alignment = 16;

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		break;

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#endif

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	case DataFormat::ETC2_R8G8B8_UNORM_BLOCK:

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		internalFormat = GL_COMPRESSED_RGB8_ETC2;

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		format = GL_RGB;

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		type = GL_FLOAT;

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		alignment = 8;

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		break;

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	case DataFormat::ETC2_R8G8B8A1_UNORM_BLOCK:

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		internalFormat = GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2;

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		format = GL_RGBA;

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		type = GL_FLOAT;

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		alignment = 16;

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		break;

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	case DataFormat::ETC2_R8G8B8A8_UNORM_BLOCK:

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		internalFormat = GL_COMPRESSED_RGBA8_ETC2_EAC;

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		format = GL_RGBA;

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		type = GL_FLOAT;

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		alignment = 16;

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		break;

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#ifdef GL_COMPRESSED_RGBA_ASTC_4x4_KHR

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	case DataFormat::ASTC_4x4_UNORM_BLOCK:

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		internalFormat = GL_COMPRESSED_RGBA_ASTC_4x4_KHR;

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		format = GL_RGBA;

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		type = GL_FLOAT;

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		alignment = 16;

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		break;

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#endif

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	default:

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		return false;

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	}

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	return true;

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}

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}

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