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Add new texel buffer type.

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GLSL 3+ shaders can read from texel buffers by declaring a uniform samplerBuffer variable and calling texelFetch with a 0-based index, in the shader code. All attributes in a texel buffer's format array must have the same data format (e.g. all 'floatvec4' formats).

Shader:send accepts a texel Buffer for samplerBuffer uniforms.

Added 'texelbuffer' to love.graphics.getSupported (requires GLSL 3+ and desktop OpenGL).
Added 'texelbuffersize' to love.graphics.getSystemLimits. Returns the max number of values in a texel buffer (array length multiplied by the number of attributes declared in the buffer's format array).
This commit is contained in:
Alex Szpakowski
2020-07-28 20:44:36 -03:00
parent 3c65d5ae41
commit b011487a3e
18 changed files with 445 additions and 62 deletions
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src/modules/graphics/opengl/Shader.h
+6
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@@ -62,6 +62,7 @@ public:
const UniformInfo *getUniformInfo(BuiltinUniform builtin) const override;
void updateUniform(const UniformInfo *info, int count) override;
void sendTextures(const UniformInfo *info, love::graphics::Texture **textures, int count) override;
void sendBuffers(const UniformInfo *info, love::graphics::Buffer **buffers, int count) override;
bool hasUniform(const std::string &name) const override;
ptrdiff_t getHandle() const override;
void setVideoTextures(love::graphics::Texture *ytexture, love::graphics::Texture *cbtexture, love::graphics::Texture *crtexture) override;
@@ -75,6 +76,7 @@ private:
{
GLuint texture = 0;
TextureType type = TEXTURE_2D;
bool isTexelBuffer = false;
bool active = false;
};
@@ -83,11 +85,13 @@ private:
void updateUniform(const UniformInfo *info, int count, bool internalupdate);
void sendTextures(const UniformInfo *info, love::graphics::Texture **textures, int count, bool internalupdate);
void sendBuffers(const UniformInfo *info, love::graphics::Buffer **buffers, int count, bool internalupdate);
int getUniformTypeComponents(GLenum type) const;
MatrixSize getMatrixSize(GLenum type) const;
UniformType getUniformBaseType(GLenum type) const;
TextureType getUniformTextureType(GLenum type) const;
DataBaseType getUniformTexelBufferType(GLenum type) const;
bool isDepthTextureType(GLenum type) const;
void flushBatchedDraws() const;
@@ -115,6 +119,8 @@ private:
std::vector<std::pair<const UniformInfo *, int>> pendingUniformUpdates;
std::vector<Buffer *> buffersToUnmap;
float lastPointSize;
}; // Shader