mirror of
https://github.com/OpenRCT2/OpenRCT2
synced 2026-01-06 06:32:56 +01:00
01b577fa58
* Improve performance of panning the viewport with OpenGL renderer * Use a shader to perform the copy rect operation * Clear the frame buffer after its initialized * Handle Y flip in shader, be explicit about FBO draw state * Target 330 core, remove the y flip handling * Explicitly use GL_RGB8 and not GL_RGB * Add more error handling, clear depth when depth is created * Lets try this * Make sure blend and depth are disabled * Bind the source fbo for reading * Try this alternative approach * Set read and draw buffer before glBlitFramebuffer * Apple is forcing my hand * Update changelog.txt
64 lines
1.6 KiB
GLSL
64 lines
1.6 KiB
GLSL
#version 330 core
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// Allows for about 8 million draws per frame
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const float DEPTH_INCREMENT = 1.0 / float(1u << 22u);
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uniform ivec2 uScreenSize;
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// clang-format off
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in ivec4 vClip;
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in int vTexColourAtlas;
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in vec4 vTexColourCoords;
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in int vTexMaskAtlas;
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in vec4 vTexMaskCoords;
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in ivec3 vPalettes;
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in int vFlags;
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in uint vColour;
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in ivec4 vBounds;
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in int vDepth;
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in float vZoom;
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in mat4x2 vVertMat;
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in vec2 vVertVec;
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flat out vec2 fPosition;
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out vec3 fPeelPos;
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flat out int fFlags;
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flat out uint fColour;
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flat out vec4 fTexColour;
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flat out vec4 fTexMask;
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flat out vec3 fPalettes;
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flat out float fZoom;
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flat out int fTexColourAtlas;
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flat out int fTexMaskAtlas;
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// clang-format on
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void main()
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{
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// Clamp position by vClip, correcting interpolated values for the clipping
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vec2 m = clamp(
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((vVertMat * vec4(vClip)) - (vVertMat * vec4(vBounds))) / vec2(vBounds.zw - vBounds.xy) + vVertVec, 0.0, 1.0);
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vec2 pos = mix(vec2(vBounds.xy), vec2(vBounds.zw), m);
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fTexColour = vTexColourCoords;
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fTexMask = vTexMaskCoords;
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fPosition = vBounds.xy;
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fZoom = vZoom;
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fTexColourAtlas = vTexColourAtlas;
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fTexMaskAtlas = vTexMaskAtlas;
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// Transform screen coordinates to texture coordinates
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float depth = 1.0 - (float(vDepth) + 1.0) * DEPTH_INCREMENT;
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pos = pos / vec2(uScreenSize);
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pos.y = pos.y * -1.0 + 1.0;
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fPeelPos = vec3(pos, depth * 0.5 + 0.5);
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fFlags = vFlags;
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fColour = vColour;
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fPalettes = vec3(vPalettes);
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// Transform texture coordinates to viewport coordinates
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pos = pos * 2.0 - 1.0;
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gl_Position = vec4(pos, depth, 1.0);
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}
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