minecraft-pi-reborn/gles-compatibility-layer
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This commit is contained in:
TheBrokenRail 2024-07-10 23:08:09 -04:00
parent 68561e0404
commit fedc5ac218
2 changed files with 52 additions and 10 deletions
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1
include/GLES/gl.h
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@ -156,6 +156,7 @@ void glGenBuffers(GLsizei n, GLuint *buffers);
GLenum glGetError();
void glBufferSubData(GLenum target, GLintptr offset, GLsizeiptr size, const void *data);
void glPixelStorei(GLenum pname, GLint param);
void glMultiDrawArrays(GLenum mode, const GLint *first, const GLsizei *count, GLsizei drawcount);
// Init
typedef void *(*getProcAddress_t)(const char *);

61
src/draw.c
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@ -131,7 +131,6 @@ void init_gles_compatibility_layer(getProcAddress_t new_getProcAddress) {
}
// Array Pointer Drawing
GL_FUNC(glDrawArrays, void, (GLenum mode, GLint first, GLsizei count));
#define lazy_handle(function, name) \
static GLint name##_handle = -1; \
if (name##_handle == -1) { \
@ -143,7 +142,7 @@ GL_FUNC(glDrawArrays, void, (GLenum mode, GLint first, GLsizei count));
}
#define lazy_uniform(name) lazy_handle(glGetUniformLocation, name)
#define lazy_attrib(name) lazy_handle(glGetAttribLocation, name)
void glDrawArrays(GLenum mode, GLint first, GLsizei count) {
static void draw(void (*func)(const void *), const void *data) {
// Verify
if (gl_state.array_pointers.vertex.size != 3 || !gl_state.array_pointers.vertex.enabled || gl_state.array_pointers.vertex.type != GL_FLOAT) {
ERR("Unsupported Vertex Conifguration");
@ -157,17 +156,17 @@ void glDrawArrays(GLenum mode, GLint first, GLsizei count) {
}
// Check Mode
int use_color_pointer = gl_state.array_pointers.color.enabled;
const int use_color_pointer = gl_state.array_pointers.color.enabled;
if (use_color_pointer && (gl_state.array_pointers.color.size != 4 || gl_state.array_pointers.color.type != GL_UNSIGNED_BYTE)) {
ERR("Unsupported Color Conifguration");
ERR("Unsupported Color Configuration");
}
int use_texture = gl_state.texture_2d && gl_state.array_pointers.tex_coord.enabled;
const int use_texture = gl_state.texture_2d && gl_state.array_pointers.tex_coord.enabled;
if (use_texture && (gl_state.array_pointers.tex_coord.size != 2 || gl_state.array_pointers.tex_coord.type != GL_FLOAT)) {
ERR("Unsupported Texture Conifguration");
ERR("Unsupported Texture Configuration");
}
// Get Shader
GLuint program = get_shader();
const GLuint program = get_shader();
// Projection Matrix
lazy_uniform(u_projection);
@ -180,8 +179,8 @@ void glDrawArrays(GLenum mode, GLint first, GLsizei count) {
real_glUniformMatrix4fv()(u_model_view_handle, 1, 0, (GLfloat *) &model_view->data[0][0]);
// Has Texture
lazy_uniform(u_has_texture); \
real_glUniform1i()(u_has_texture_handle, use_texture); \
lazy_uniform(u_has_texture);
real_glUniform1i()(u_has_texture_handle, use_texture);
// Texture Matrix
lazy_uniform(u_texture);
@ -234,7 +233,7 @@ void glDrawArrays(GLenum mode, GLint first, GLsizei count) {
}
// Draw
real_glDrawArrays()(mode, first, count);
func(data);
// Cleanup
if (use_color_pointer) {
@ -245,3 +244,45 @@ void glDrawArrays(GLenum mode, GLint first, GLsizei count) {
real_glDisableVertexAttribArray()(a_texture_coords_handle);
}
}
// glDrawArrays
struct cmd_glDrawArrays {
GLenum mode;
GLint first;
GLsizei count;
};
GL_FUNC(glDrawArrays, void, (GLenum mode, GLint first, GLsizei count));
static void do_glDrawArrays(const void *data) {
const struct cmd_glDrawArrays *cmd = data;
real_glDrawArrays()(cmd->mode, cmd->first, cmd->count);
}
void glDrawArrays(const GLenum mode, const GLint first, const GLsizei count) {
const struct cmd_glDrawArrays cmd = {
.mode = mode,
.first = first,
.count = count
};
draw(do_glDrawArrays, &cmd);
}
// glMultiDrawArrays
struct cmd_glMultiDrawArrays {
GLenum mode;
const GLint *first;
const GLsizei *count;
GLsizei drawcount;
};
GL_FUNC(glMultiDrawArraysEXT, void, (GLenum mode, const GLint *first, const GLsizei *count, GLsizei drawcount));
static void do_glMultiDrawArrays(const void *data) {
const struct cmd_glMultiDrawArrays *cmd = data;
real_glMultiDrawArraysEXT()(cmd->mode, cmd->first, cmd->count, cmd->drawcount);
}
void glMultiDrawArrays(const GLenum mode, const GLint *first, const GLsizei *count, const GLsizei drawcount) {
const struct cmd_glMultiDrawArrays cmd = {
.mode = mode,
.first = first,
.count = count,
.drawcount = drawcount
};
draw(do_glMultiDrawArrays, &cmd);
}