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app/internal/glimpl: add gl functions for uniform buffers

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Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2020-02-24 13:22:55 +01:00
parent 23757b1022
commit 3a5a2cff6b
3 changed files with 61 additions and 1 deletions
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app/internal/glimpl/gl.go
+35
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@@ -41,6 +41,9 @@ import (
#include <GLES3/gl3.h>
#endif
static void (*_glBindBufferBase)(GLenum target, GLuint index, GLuint buffer);
static GLuint (*_glGetUniformBlockIndex)(GLuint program, const GLchar *uniformBlockName);
static void (*_glUniformBlockBinding)(GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
static void (*_glInvalidateFramebuffer)(GLenum target, GLsizei numAttachments, const GLenum *attachments);
static void (*_glBeginQuery)(GLenum target, GLuint id);
@@ -60,6 +63,18 @@ __attribute__ ((visibility ("hidden"))) void gio_glDrawElements(GLenum mode, GLs
glDrawElements(mode, count, type, (const GLvoid *)offset);
}
__attribute__ ((visibility ("hidden"))) void gio_glBindBufferBase(GLenum target, GLuint index, GLuint buffer) {
_glBindBufferBase(target, index, buffer);
}
__attribute__ ((visibility ("hidden"))) void gio_glUniformBlockBinding(GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding) {
_glUniformBlockBinding(program, uniformBlockIndex, uniformBlockBinding);
}
__attribute__ ((visibility ("hidden"))) GLuint gio_glGetUniformBlockIndex(GLuint program, const GLchar *uniformBlockName) {
return _glGetUniformBlockIndex(program, uniformBlockName);
}
__attribute__ ((visibility ("hidden"))) void gio_glInvalidateFramebuffer(GLenum target, GLenum attachment) {
// gl.Framebuffer invalidation is just a hint and can safely be ignored.
if (_glInvalidateFramebuffer != NULL) {
@@ -104,10 +119,16 @@ __attribute__((constructor)) static void gio_loadGLFunctions() {
_glGenQueries = glGenQueries;
_glGetQueryObjectuiv = glGetQueryObjectuiv;
#endif
_glBindBufferBase = glBindBufferBase;
_glGetUniformBlockIndex = glGetUniformBlockIndex;
_glUniformBlockBinding = glUniformBlockBinding;
_glGetStringi = glGetStringi;
#else
// Load libGLESv3 if available.
dlopen("libGLESv3.so", RTLD_NOW | RTLD_GLOBAL);
_glBindBufferBase = dlsym(RTLD_DEFAULT, "glBindBufferBase");
_glGetUniformBlockIndex = dlsym(RTLD_DEFAULT, "glGetUniformBlockIndex");
_glUniformBlockBinding = dlsym(RTLD_DEFAULT, "glUniformBlockBinding");
_glInvalidateFramebuffer = dlsym(RTLD_DEFAULT, "glInvalidateFramebuffer");
_glGetStringi = dlsym(RTLD_DEFAULT, "glGetStringi");
// Fall back to EXT_invalidate_framebuffer if available.
@@ -159,6 +180,10 @@ func (f *Functions) BindAttribLocation(p gl.Program, a gl.Attrib, name string) {
C.glBindAttribLocation(C.GLuint(p.V), C.GLuint(a), cname)
}
func (f *Functions) BindBufferBase(target gl.Enum, index int, b gl.Buffer) {
C.gio_glBindBufferBase(C.GLenum(target), C.GLuint(index), C.GLuint(b.V))
}
func (f *Functions) BindBuffer(target gl.Enum, b gl.Buffer) {
C.glBindBuffer(C.GLenum(target), C.GLuint(b.V))
}
@@ -407,6 +432,12 @@ func (f *Functions) GetString(pname gl.Enum) string {
}
}
func (f *Functions) GetUniformBlockIndex(p gl.Program, name string) uint {
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
return uint(C.gio_glGetUniformBlockIndex(C.GLuint(p.V), cname))
}
func (f *Functions) GetUniformLocation(p gl.Program, name string) gl.Uniform {
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
@@ -468,6 +499,10 @@ func (f *Functions) TexParameteri(target, pname gl.Enum, param int) {
C.glTexParameteri(C.GLenum(target), C.GLenum(pname), C.GLint(param))
}
func (f *Functions) UniformBlockBinding(p gl.Program, uniformBlockIndex uint, uniformBlockBinding uint) {
C.gio_glUniformBlockBinding(C.GLuint(p.V), C.GLuint(uniformBlockIndex), C.GLuint(uniformBlockBinding))
}
func (f *Functions) Uniform1f(dst gl.Uniform, v float32) {
C.glUniform1f(C.GLint(dst.V), C.GLfloat(v))
}