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fix shaders_deffered_render.c for OpenGL ES 3 (#4617)

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This fixes an incomplete framebuffer issue due to the use of a texture format not supported in ES 3.
This commit also adds more information on how to manage deferred rendering.
This commit is contained in:
Le Juez Victor 2024-12-18 18:07:48 +01:00 committed by GitHub
parent 99cb4cbc36
commit 6eb1206660
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1 changed files with 12 additions and 4 deletions
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examples/shaders/shaders_deferred_render.c
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@ -95,11 +95,19 @@ int main(void)
rlEnableFramebuffer(gBuffer.framebuffer);
// Since we are storing position and normal data in these textures,
// we need to use a floating point format.
gBuffer.positionTexture = rlLoadTexture(NULL, screenWidth, screenHeight, RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32, 1);
// NOTE: Vertex positions are stored in a texture for simplicity. A better approach would use a depth texture
// (instead of a detph renderbuffer) to reconstruct world positions in the final render shader via clip-space position,
// depth, and the inverse view/projection matrices.
// 16-bit precision ensures OpenGL ES 3 compatibility, though it may lack precision for real scenarios.
// But as mentioned above, the positions could be reconstructed instead of stored. If not targeting OpenGL ES
// and you wish to maintain this approach, consider using `RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32`.
gBuffer.positionTexture = rlLoadTexture(NULL, screenWidth, screenHeight, RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16, 1);
// Similarly, 16-bit precision is used for normals ensures OpenGL ES 3 compatibility.
// This is generally sufficient, but a 16-bit fixed-point format offer a better uniform precision in all orientations.
gBuffer.normalTexture = rlLoadTexture(NULL, screenWidth, screenHeight, RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16, 1);
gBuffer.normalTexture = rlLoadTexture(NULL, screenWidth, screenHeight, RL_PIXELFORMAT_UNCOMPRESSED_R32G32B32, 1);
// Albedo (diffuse color) and specular strength can be combined into one texture.
// The color in RGB, and the specular strength in the alpha channel.
gBuffer.albedoSpecTexture = rlLoadTexture(NULL, screenWidth, screenHeight, RL_PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, 1);