Merge commit 'dec0d4ec4153bf9fc2b78ae6c2df45b6ea8dde7a' as 'external/sdl/SDL'

external/sdl/SDL/src/render/opengles2/SDL_shaders_gles2.h

@@ -0,0 +1,71 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_shaders_gles2_h_
+#define SDL_shaders_gles2_h_
+
+#ifdef SDL_VIDEO_RENDER_OGL_ES2
+
+typedef enum
+{
+    GLES2_SHADER_FRAGMENT_INCLUDE_NONE = 0,
+    GLES2_SHADER_FRAGMENT_INCLUDE_BEST_TEXCOORD_PRECISION,
+    GLES2_SHADER_FRAGMENT_INCLUDE_MEDIUM_TEXCOORD_PRECISION,
+    GLES2_SHADER_FRAGMENT_INCLUDE_HIGH_TEXCOORD_PRECISION,
+    GLES2_SHADER_FRAGMENT_INCLUDE_UNDEF_PRECISION,
+    GLES2_SHADER_FRAGMENT_INCLUDE_COUNT
+} GLES2_ShaderIncludeType;
+
+typedef enum
+{
+    GLES2_SHADER_VERTEX_DEFAULT = 0,
+    GLES2_SHADER_FRAGMENT_SOLID,
+    GLES2_SHADER_FRAGMENT_TEXTURE_ABGR,
+    GLES2_SHADER_FRAGMENT_TEXTURE_ARGB,
+    GLES2_SHADER_FRAGMENT_TEXTURE_BGR,
+    GLES2_SHADER_FRAGMENT_TEXTURE_RGB,
+#if SDL_HAVE_YUV
+    GLES2_SHADER_FRAGMENT_TEXTURE_YUV_JPEG,
+    GLES2_SHADER_FRAGMENT_TEXTURE_YUV_BT601,
+    GLES2_SHADER_FRAGMENT_TEXTURE_YUV_BT709,
+    GLES2_SHADER_FRAGMENT_TEXTURE_NV12_JPEG,
+    GLES2_SHADER_FRAGMENT_TEXTURE_NV12_RA_BT601,
+    GLES2_SHADER_FRAGMENT_TEXTURE_NV12_RG_BT601,
+    GLES2_SHADER_FRAGMENT_TEXTURE_NV12_RA_BT709,
+    GLES2_SHADER_FRAGMENT_TEXTURE_NV12_RG_BT709,
+    GLES2_SHADER_FRAGMENT_TEXTURE_NV21_JPEG,
+    GLES2_SHADER_FRAGMENT_TEXTURE_NV21_BT601,
+    GLES2_SHADER_FRAGMENT_TEXTURE_NV21_BT709,
+#endif
+    /* Shaders beyond this point are optional and not cached at render creation */
+    GLES2_SHADER_FRAGMENT_TEXTURE_EXTERNAL_OES,
+    GLES2_SHADER_COUNT
+} GLES2_ShaderType;
+
+extern const char *GLES2_GetShaderPrologue(GLES2_ShaderType type);
+extern const char *GLES2_GetShaderInclude(GLES2_ShaderIncludeType type);
+extern const char *GLES2_GetShader(GLES2_ShaderType type);
+extern GLES2_ShaderIncludeType GLES2_GetTexCoordPrecisionEnumFromHint(void);
+
+#endif /* SDL_VIDEO_RENDER_OGL_ES2 */
+
+#endif /* SDL_shaders_gles2_h_ */