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Continuation of support for ES3/WebGL2 (#3107)
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* Continuation of support for ES3/WebGL2

* GetTouchPointState()

* Amends to the WebGL2 PR

---------

Co-authored-by: root <root@DESKTOP-GLOV9QV>
Co-authored-by: chemguerra <[email protected]>
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@chemaguerra
3 people authored Jun 12, 2023
1 parent 2e00d16 commit f385d0c
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Showing 2 changed files with 49 additions and 4 deletions.
1 change: 1 addition & 0 deletions src/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -246,6 +246,7 @@ endif
ifeq ($(PLATFORM),PLATFORM_WEB)
# On HTML5 OpenGL ES 2.0 is used, emscripten translates it to WebGL 1.0
GRAPHICS = GRAPHICS_API_OPENGL_ES2
#GRAPHICS = GRAPHICS_API_OPENGL_ES3 # Uncomment to use ES3/WebGL2 (preliminary support).
endif
ifeq ($(PLATFORM),PLATFORM_ANDROID)
# By default use OpenGL ES 2.0 on Android
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52 changes: 48 additions & 4 deletions src/rlgl.h
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Original file line number Diff line number Diff line change
Expand Up @@ -148,7 +148,8 @@
!defined(GRAPHICS_API_OPENGL_21) && \
!defined(GRAPHICS_API_OPENGL_33) && \
!defined(GRAPHICS_API_OPENGL_43) && \
!defined(GRAPHICS_API_OPENGL_ES2)
!defined(GRAPHICS_API_OPENGL_ES2) && \
!defined(GRAPHICS_API_OPENGL_ES3)
#define GRAPHICS_API_OPENGL_33
#endif

Expand Down Expand Up @@ -1711,7 +1712,7 @@ void rlDisableFramebuffer(void)
// NOTE: One color buffer is always active by default
void rlActiveDrawBuffers(int count)
{
#if (defined(GRAPHICS_API_OPENGL_33) && defined(RLGL_RENDER_TEXTURES_HINT))
#if ((defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES3)) && defined(RLGL_RENDER_TEXTURES_HINT))
// NOTE: Maximum number of draw buffers supported is implementation dependant,
// it can be queried with glGet*() but it must be at least 8
//GLint maxDrawBuffers = 0;
Expand All @@ -1723,6 +1724,16 @@ void rlActiveDrawBuffers(int count)
else
{
unsigned int buffers[8] = {
#if defined(GRAPHICS_API_OPENGL_ES3)
GL_COLOR_ATTACHMENT0_EXT,
GL_COLOR_ATTACHMENT1_EXT,
GL_COLOR_ATTACHMENT2_EXT,
GL_COLOR_ATTACHMENT3_EXT,
GL_COLOR_ATTACHMENT4_EXT,
GL_COLOR_ATTACHMENT5_EXT,
GL_COLOR_ATTACHMENT6_EXT,
GL_COLOR_ATTACHMENT7_EXT,
#else
GL_COLOR_ATTACHMENT0,
GL_COLOR_ATTACHMENT1,
GL_COLOR_ATTACHMENT2,
Expand All @@ -1731,9 +1742,14 @@ void rlActiveDrawBuffers(int count)
GL_COLOR_ATTACHMENT5,
GL_COLOR_ATTACHMENT6,
GL_COLOR_ATTACHMENT7,
#endif
};

#if defined(GRAPHICS_API_OPENGL_ES3)
glDrawBuffersEXT(count, buffers);
#else
glDrawBuffers(count, buffers);
#endif
}
}
else TRACELOG(LOG_WARNING, "GL: One color buffer active by default");
Expand Down Expand Up @@ -2201,7 +2217,29 @@ void rlLoadExtensions(void *loader)

#endif // GRAPHICS_API_OPENGL_33

#if defined(GRAPHICS_API_OPENGL_ES2)
#if defined(GRAPHICS_API_OPENGL_ES3)
// Register supported extensions flags
// OpenGL ES 3.0 extensions supported by default
RLGL.ExtSupported.vao = true;
RLGL.ExtSupported.instancing = true;
RLGL.ExtSupported.texNPOT = true;
RLGL.ExtSupported.texFloat32 = true;
RLGL.ExtSupported.texDepth = true;
RLGL.ExtSupported.texDepthWebGL = true;
RLGL.ExtSupported.maxDepthBits = 24;
RLGL.ExtSupported.texAnisoFilter = true;
RLGL.ExtSupported.texMirrorClamp = true;
// TODO: Make sure that the ones above are actually present by default
// TODO: Check for these...
// RLGL.ExtSupported.texCompDXT
// RLGL.ExtSupported.texCompETC1
// RLGL.ExtSupported.texCompETC2
// RLGL.ExtSupported.texCompPVRT
// RLGL.ExtSupported.texCompASTC
// RLGL.ExtSupported.computeShader
// RLGL.ExtSupported.ssbo
// RLGL.ExtSupported.maxAnisotropyLevel
#elif defined(GRAPHICS_API_OPENGL_ES2)

#if defined(PLATFORM_DESKTOP)
// TODO: Support OpenGL ES 3.0
Expand Down Expand Up @@ -3057,7 +3095,7 @@ unsigned int rlLoadTextureDepth(int width, int height, bool useRenderBuffer)
// Possible formats: GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT32 and GL_DEPTH_COMPONENT32F
unsigned int glInternalFormat = GL_DEPTH_COMPONENT;

#if defined(GRAPHICS_API_OPENGL_ES2)
#if (defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_ES3))
// WARNING: WebGL platform requires unsized internal format definition (GL_DEPTH_COMPONENT)
// while other platforms using OpenGL ES 2.0 require/support sized internal formats depending on the GPU capabilities
if (!RLGL.ExtSupported.texDepthWebGL || useRenderBuffer)
Expand Down Expand Up @@ -3214,10 +3252,16 @@ void rlGetGlTextureFormats(int format, unsigned int *glInternalFormat, unsigned
case RL_PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_SHORT_4_4_4_4; break;
case RL_PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_BYTE; break;
#if !defined(GRAPHICS_API_OPENGL_11)
#if defined(GRAPHICS_API_OPENGL_ES3)
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;
#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
#endif
#endif
#elif defined(GRAPHICS_API_OPENGL_33)
case RL_PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: *glInternalFormat = GL_R8; *glFormat = GL_RED; *glType = GL_UNSIGNED_BYTE; break;
case RL_PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: *glInternalFormat = GL_RG8; *glFormat = GL_RG; *glType = GL_UNSIGNED_BYTE; break;
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