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fix glDrawBuffers

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This commit is contained in:
Tungstend 2025-02-06 01:43:21 +08:00
parent c59019b7dd
commit 3fdd673aae
5 changed files with 108 additions and 3 deletions
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1
app/src/main/cpp/CMakeLists.txt
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@ -30,6 +30,7 @@ add_library(${CMAKE_PROJECT_NAME} SHARED
gl/log.c
gl/program.c
gl/shader.c
gl/framebuffer.c
gl/texture.cpp
gl/drawing.c
gl/mg.c

18
app/src/main/cpp/gl/drawing.c
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@ -4,6 +4,7 @@
#include "drawing.h"
#include "buffer.h"
#include "framebuffer.h"
#define DEBUG 0
@ -84,8 +85,23 @@ void glDrawBuffers(GLsizei n, const GLenum *bufs) {
LOG()
LOG_D("glDrawBuffers(%d, %p), [0]=0x%x", n, bufs, n ? bufs[0] : 0)
GLenum new_bufs[n];
for (int i = 0; i < n; i++) {
if (bufs[i] >= GL_COLOR_ATTACHMENT0 && bufs <= GL_COLOR_ATTACHMENT0 + getMaxDrawBuffers()) {
GLenum target_attachment = GL_COLOR_ATTACHMENT0 + i;
new_bufs[i] = target_attachment;
if (bufs[i] == target_attachment)
continue;
rebind_framebuffer(bufs[i], target_attachment);
} else {
new_bufs[i] = bufs[i];
}
}
LOAD_GLES(glDrawBuffers, void, GLsizei n, const GLenum *bufs)
gles_glDrawBuffers(n, bufs);
gles_glDrawBuffers(n, new_bufs);
CHECK_GL_ERROR
}

57
app/src/main/cpp/gl/framebuffer.c Normal file
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@ -0,0 +1,57 @@
//
// Created by hanji on 2025/2/6.
//
#include "framebuffer.h"
#include "log.h"
#define DEBUG 0
struct framebuffer_t* bound_framebuffer;
GLint MAX_DRAW_BUFFERS = 0;
GLint getMaxDrawBuffers() {
if (!MAX_DRAW_BUFFERS) {
LOAD_GLES(glGetIntegerv, void, GLenum pname, GLint *params)
gles_glGetIntegerv(GL_MAX_DRAW_BUFFERS, &MAX_DRAW_BUFFERS);
}
return MAX_DRAW_BUFFERS;
}
void rebind_framebuffer(GLenum old_attachment, GLenum target_attachment) {
struct attachment_t attachment = bound_framebuffer->attachment[old_attachment - GL_COLOR_ATTACHMENT0];
LOAD_GLES(glFramebufferTexture2D, void, GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level)
gles_glFramebufferTexture2D(bound_framebuffer->target, target_attachment, attachment.textarget, attachment.texture, attachment.level);
}
void glBindFramebuffer(GLenum target, GLuint framebuffer) {
LOG()
LOG_D("glBindFramebuffer(0x%x, %d)", target, framebuffer)
LOAD_GLES(glBindFramebuffer, void, GLenum target, GLuint framebuffer)
gles_glBindFramebuffer(target, framebuffer);
bound_framebuffer = NULL;
bound_framebuffer = malloc(sizeof(struct framebuffer_t));
bound_framebuffer->target = target;
CHECK_GL_ERROR
}
void glFramebufferTexture2D(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level) {
LOG()
LOG_D("glFramebufferTexture2D(0x%x, 0x%x, 0x%x, %d, %d)", target, attachment, textarget, texture, level)
bound_framebuffer->attachment[attachment - GL_COLOR_ATTACHMENT0].textarget = textarget;
bound_framebuffer->attachment[attachment - GL_COLOR_ATTACHMENT0].texture = texture;
bound_framebuffer->attachment[attachment - GL_COLOR_ATTACHMENT0].level = level;
LOAD_GLES(glFramebufferTexture2D, void, GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level)
gles_glFramebufferTexture2D(target, attachment, textarget, texture, level);
CHECK_GL_ERROR
}

31
app/src/main/cpp/gl/framebuffer.h Normal file
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@ -0,0 +1,31 @@
//
// Created by hanji on 2025/2/6.
//
#ifndef MOBILEGLUES_FRAMEBUFFER_H
#define MOBILEGLUES_FRAMEBUFFER_H
#include "gl.h"
struct attachment_t {
GLenum textarget;
GLuint texture;
GLint level;
};
struct framebuffer_t {
GLenum target;
struct attachment_t attachment[];
};
extern struct framebuffer_t* bound_framebuffer;
GLint getMaxDrawBuffers();
void rebind_framebuffer(GLenum old_attachment, GLenum target_attachment);
GLAPI GLAPIENTRY void glBindFramebuffer(GLenum target, GLuint framebuffer);
GLAPI GLAPIENTRY void glFramebufferTexture2D(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
#endif //MOBILEGLUES_FRAMEBUFFER_H

4
app/src/main/cpp/gl/gl_native.c
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@ -17,7 +17,7 @@ NATIVE_FUNCTION_HEAD(void, glActiveTexture, GLenum texture) NATIVE_FUNCTION_END_
NATIVE_FUNCTION_HEAD(void, glAttachShader, GLuint program, GLuint shader) NATIVE_FUNCTION_END_NO_RETURN(void, glAttachShader, program,shader)
NATIVE_FUNCTION_HEAD(void, glBindAttribLocation, GLuint program, GLuint index, const GLchar *name) NATIVE_FUNCTION_END_NO_RETURN(void, glBindAttribLocation, program,index,name)
NATIVE_FUNCTION_HEAD(void, glBindBuffer, GLenum target, GLuint buffer) NATIVE_FUNCTION_END_NO_RETURN(void, glBindBuffer, target,buffer)
NATIVE_FUNCTION_HEAD(void, glBindFramebuffer, GLenum target, GLuint framebuffer) NATIVE_FUNCTION_END_NO_RETURN(void, glBindFramebuffer, target,framebuffer)
//NATIVE_FUNCTION_HEAD(void, glBindFramebuffer, GLenum target, GLuint framebuffer) NATIVE_FUNCTION_END_NO_RETURN(void, glBindFramebuffer, target,framebuffer)
NATIVE_FUNCTION_HEAD(void, glBindRenderbuffer, GLenum target, GLuint renderbuffer) NATIVE_FUNCTION_END_NO_RETURN(void, glBindRenderbuffer, target,renderbuffer)
//NATIVE_FUNCTION_HEAD(void, glBindTexture, GLenum target, GLuint texture) NATIVE_FUNCTION_END_NO_RETURN(void, glBindTexture, target,texture)
NATIVE_FUNCTION_HEAD(void, glBlendColor, GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha) NATIVE_FUNCTION_END_NO_RETURN(void, glBlendColor, red,green,blue,alpha)
@ -60,7 +60,7 @@ NATIVE_FUNCTION_HEAD(void, glEnableVertexAttribArray, GLuint index) NATIVE_FUNCT
NATIVE_FUNCTION_HEAD(void, glFinish) NATIVE_FUNCTION_END_NO_RETURN(void, glFinish)
NATIVE_FUNCTION_HEAD(void, glFlush) NATIVE_FUNCTION_END_NO_RETURN(void, glFlush)
NATIVE_FUNCTION_HEAD(void, glFramebufferRenderbuffer, GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer) NATIVE_FUNCTION_END_NO_RETURN(void, glFramebufferRenderbuffer, target,attachment,renderbuffertarget,renderbuffer)
NATIVE_FUNCTION_HEAD(void, glFramebufferTexture2D, GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level) NATIVE_FUNCTION_END_NO_RETURN(void, glFramebufferTexture2D, target,attachment,textarget,texture,level)
//NATIVE_FUNCTION_HEAD(void, glFramebufferTexture2D, GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level) NATIVE_FUNCTION_END_NO_RETURN(void, glFramebufferTexture2D, target,attachment,textarget,texture,level)
NATIVE_FUNCTION_HEAD(void, glFrontFace, GLenum mode) NATIVE_FUNCTION_END_NO_RETURN(void, glFrontFace, mode)
NATIVE_FUNCTION_HEAD(void, glGenBuffers, GLsizei n, GLuint *buffers) NATIVE_FUNCTION_END_NO_RETURN(void, glGenBuffers, n,buffers)
NATIVE_FUNCTION_HEAD(void, glGenerateMipmap, GLenum target) NATIVE_FUNCTION_END_NO_RETURN(void, glGenerateMipmap, target)