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Support OpenGL 1.1 fallback in 64 bit Windows

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This commit is contained in:
UnknownShadow200 2022-04-12 23:42:52 +10:00
parent 9d81f4a175
commit c891f8d656
1 changed files with 23 additions and 17 deletions
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40
src/Graphics_GL1.c
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@ -149,7 +149,7 @@ static void* dynamicListData;
static cc_uint16 gl_indices[GFX_MAX_INDICES];
#else
/* OpenGL functions use stdcall instead of cdecl on Windows */
static void (APIENTRY *_glBindBuffer)(GLenum target, GLuint buffer);
static void (APIENTRY *_glBindBuffer)(GLenum target, GfxResourceID buffer); /* NOTE: buffer is actually a GLuint in OpenGL */
static void (APIENTRY *_glDeleteBuffers)(GLsizei n, const GLuint *buffers);
static void (APIENTRY *_glGenBuffers)(GLsizei n, GLuint *buffers);
static void (APIENTRY *_glBufferData)(GLenum target, cc_uintptr size, const GLvoid* data, GLenum usage);
@ -206,7 +206,13 @@ static GfxResourceID GL_GenBuffer(void) {
return id;
}
static void GL_DelBuffer(GfxResourceID id) {
GLuint gl_id = (GLuint)id;
_glDeleteBuffers(1, &gl_id);
}
static GfxResourceID (*_genBuffer)(void) = GL_GenBuffer;
static void (*_delBuffer)(GfxResourceID id) = GL_DelBuffer;
GfxResourceID Gfx_CreateIb(void* indices, int indicesCount) {
GfxResourceID id = _genBuffer();
@ -217,12 +223,12 @@ GfxResourceID Gfx_CreateIb(void* indices, int indicesCount) {
return id;
}
void Gfx_BindIb(GfxResourceID ib) { _glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, (GLuint)ib); }
void Gfx_BindIb(GfxResourceID ib) { _glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ib); }
void Gfx_DeleteIb(GfxResourceID* ib) {
GLuint id = (GLuint)(*ib);
GfxResourceID id = *ib;
if (!id) return;
_glDeleteBuffers(1, &id);
_delBuffer(id);
*ib = 0;
}
#else
@ -242,12 +248,12 @@ GfxResourceID Gfx_CreateVb(VertexFormat fmt, int count) {
return id;
}
void Gfx_BindVb(GfxResourceID vb) { _glBindBuffer(GL_ARRAY_BUFFER, (GLuint)vb); }
void Gfx_BindVb(GfxResourceID vb) { _glBindBuffer(GL_ARRAY_BUFFER, vb); }
void Gfx_DeleteVb(GfxResourceID* vb) {
GLuint id = (GLuint)(*vb);
GfxResourceID id = *vb;
if (!id) return;
_glDeleteBuffers(1, &id);
_delBuffer(id);
*vb = 0;
}
@ -328,13 +334,13 @@ void* Gfx_LockDynamicVb(GfxResourceID vb, VertexFormat fmt, int count) {
}
void Gfx_UnlockDynamicVb(GfxResourceID vb) {
_glBindBuffer(GL_ARRAY_BUFFER, (GLuint)vb);
_glBindBuffer(GL_ARRAY_BUFFER, vb);
_glBufferSubData(GL_ARRAY_BUFFER, 0, tmpSize, tmpData);
}
void Gfx_SetDynamicVbData(GfxResourceID vb, void* vertices, int vCount) {
cc_uint32 size = vCount * gfx_stride;
_glBindBuffer(GL_ARRAY_BUFFER, (GLuint)vb);
_glBindBuffer(GL_ARRAY_BUFFER, vb);
_glBufferSubData(GL_ARRAY_BUFFER, 0, size, vertices);
}
#else
@ -497,7 +503,7 @@ cc_bool Gfx_WarnIfNecessary(void) {
static void GLBackend_Init(void) { MakeIndices(gl_indices, GFX_MAX_INDICES); }
#else
#if defined CC_BUILD_WIN && defined(_M_IX86)
#if defined CC_BUILD_WIN
/* On 32 bit windows, can replace the gl function drawing with these 1.1 fallbacks */
/* (note that this only works on 32 bit system, as OpenGL IDs are 32 bit integers) */
@ -507,19 +513,19 @@ static fake_buffer* cur_ib;
static fake_buffer* cur_vb;
#define fake_GetBuffer(target) (target == GL_ELEMENT_ARRAY_BUFFER ? &cur_ib : &cur_vb);
static void APIENTRY fake_bindBuffer(GLenum target, GLuint src) {
static void APIENTRY fake_bindBuffer(GLenum target, GfxResourceID src) {
fake_buffer** buffer = fake_GetBuffer(target);
*buffer = (fake_buffer*)src;
}
static void APIENTRY fake_deleteBuffers(GLsizei n, const GLuint *buffers) {
Mem_Free((void*)buffers[0]);
}
static GfxResourceID GenFakeBuffer(void) {
return (GfxResourceID)Mem_TryAllocCleared(1, sizeof(fake_buffer));
}
static void DelFakeBuffer(GfxResourceID id) {
Mem_Free((void*)id);
}
static void APIENTRY fake_bufferData(GLenum target, cc_uintptr size, const GLvoid* data, GLenum usage) {
fake_buffer* buffer = *fake_GetBuffer(target);
Mem_Free(buffer->data);
@ -553,8 +559,8 @@ static void OpenGL11Fallback(void) {
"As such you will likely experience very poor performance");
customMipmapsLevels = false;
_glBindBuffer = fake_bindBuffer; _glDeleteBuffers = fake_deleteBuffers;
_genBuffer = GenFakeBuffer; _glBufferData = fake_bufferData;
_glBindBuffer = fake_bindBuffer; _delBuffer = DelFakeBuffer;
_genBuffer = GenFakeBuffer; _glBufferData = fake_bufferData;
_glBufferSubData = fake_bufferSubData;
_glDrawElements = fake_drawElements; _glColorPointer = fake_colorPointer;