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tidy up OpenGL backend compatibility code, make the OpenGL 1.1 slightly more unified behaviour

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This commit is contained in:
UnknownShadow200 2021-07-21 11:50:21 +10:00
parent 2dab8f427e
commit c2fc17f0de
3 changed files with 83 additions and 81 deletions
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6
src/Graphics.h
View File

@ -138,10 +138,10 @@ CC_API void Gfx_UnlockVb(GfxResourceID vb);
GfxResourceID Gfx_CreateVb2(void* vertices, VertexFormat fmt, int count);
#endif
#ifdef CC_BUILD_GLMODERN
/* Special case Gfx_BindVb for map renderer */
void Gfx_BindVb_T2fC4b(GfxResourceID vb);
/* Special case Gfx_BindVb for use with Gfx_DrawIndexedTris_T2fC4b */
void Gfx_BindVb_Textured(GfxResourceID vb);
#else
#define Gfx_BindVb_T2fC4b Gfx_BindVb
#define Gfx_BindVb_Textured Gfx_BindVb
#endif
/* Creates a new dynamic vertex buffer, whose contents can be updated later. */

152
src/Graphics_GL.c
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@ -915,7 +915,7 @@ void Gfx_DrawVb_IndexedTris(int verticesCount) {
glDrawElements(GL_TRIANGLES, ICOUNT(verticesCount), GL_UNSIGNED_SHORT, NULL);
}
void Gfx_BindVb_T2fC4b(GfxResourceID vb) {
void Gfx_BindVb_Textured(GfxResourceID vb) {
Gfx_BindVb(vb);
GL_SetupVbTextured();
}
@ -1029,6 +1029,81 @@ cc_bool Gfx_WarnIfNecessary(void) {
}
/*########################################################################################################################*
*-------------------------------------------------------Compatibility-----------------------------------------------------*
*#########################################################################################################################*/
#ifdef CC_BUILD_GL11
static void GL_CheckSupport(void) { MakeIndices(gl_indices, GFX_MAX_INDICES); }
#else
/* fake vertex buffer objects with client side pointers */
typedef struct fake_buffer { cc_uint8* data; } fake_buffer;
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_glBindBuffer(GLenum target, GLuint src) {
fake_buffer** buffer = fake_GetBuffer(target);
*buffer = (fake_buffer*)src;
}
static void APIENTRY fake_glDeleteBuffers(GLsizei n, const GLuint *buffers) {
Mem_Free((void*)buffers[0]);
}
static void APIENTRY fake_glGenBuffers(GLsizei n, GLuint *buffers) {
fake_buffer* buffer = (fake_buffer*)Mem_TryAlloc(1, sizeof(fake_buffer));
buffer->data = NULL;
buffers[0] = (GLuint)buffer;
}
static void APIENTRY fake_glBufferData(GLenum target, cc_uintptr size, const GLvoid* data, GLenum usage) {
fake_buffer* buffer = *fake_GetBuffer(target);
Mem_Free(buffer->data);
buffer->data = Mem_TryAlloc(size, 1);
if (data) Mem_Copy(buffer->data, data, size);
}
static void APIENTRY fake_glBufferSubData(GLenum target, cc_uintptr offset, cc_uintptr size, const GLvoid* data) {
fake_buffer* buffer = *fake_GetBuffer(target);
Mem_Copy(buffer->data, data, size);
}
static void GL_CheckSupport(void) {
static const struct DynamicLibSym coreVboFuncs[5] = {
DynamicLib_Sym2("glBindBuffer", glBindBuffer), DynamicLib_Sym2("glDeleteBuffers", glDeleteBuffers),
DynamicLib_Sym2("glGenBuffers", glGenBuffers), DynamicLib_Sym2("glBufferData", glBufferData),
DynamicLib_Sym2("glBufferSubData", glBufferSubData)
};
static const struct DynamicLibSym arbVboFuncs[5] = {
DynamicLib_Sym2("glBindBufferARB", glBindBuffer), DynamicLib_Sym2("glDeleteBuffersARB", glDeleteBuffers),
DynamicLib_Sym2("glGenBuffersARB", glGenBuffers), DynamicLib_Sym2("glBufferDataARB", glBufferData),
DynamicLib_Sym2("glBufferSubDataARB", glBufferSubData)
};
static const cc_string vboExt = String_FromConst("GL_ARB_vertex_buffer_object");
cc_string extensions = String_FromReadonly((const char*)glGetString(GL_EXTENSIONS));
const GLubyte* ver = glGetString(GL_VERSION);
/* Version string is always: x.y. (and whatever afterwards) */
int major = ver[0] - '0', minor = ver[2] - '0';
/* Supported in core since 1.5 */
if (major > 1 || (major == 1 && minor >= 5)) {
GLContext_GetAll(coreVboFuncs, Array_Elems(coreVboFuncs));
} else if (String_CaselessContains(&extensions, &vboExt)) {
GLContext_GetAll(arbVboFuncs, Array_Elems(arbVboFuncs));
} else {
Logger_Abort("Only OpenGL 1.1 supported.\n\n" \
"Compile the game with CC_BUILD_GL11, or ask on the ClassiCube forums for it");
_glBindBuffer = fake_glBindBuffer; _glDeleteBuffers = fake_glDeleteBuffers;
_glGenBuffers = fake_glGenBuffers; _glBufferData = fake_glBufferData;
_glBufferSubData = fake_glBufferSubData;
}
customMipmapsLevels = true;
}
#endif
/*########################################################################################################################*
*----------------------------------------------------------Drawing--------------------------------------------------------*
*#########################################################################################################################*/
@ -1104,9 +1179,7 @@ void Gfx_DrawVb_IndexedTris(int verticesCount) {
}
#ifdef CC_BUILD_GL11
void Gfx_DrawIndexedTris_T2fC4b(int list, int ignored) { glCallList(list); }
static void GL_CheckSupport(void) { MakeIndices(gl_indices, GFX_MAX_INDICES); }
void Gfx_DrawIndexedTris_T2fC4b(int verticesCount, int startVertex) { glCallList(activeList); }
#else
void Gfx_DrawIndexedTris_T2fC4b(int verticesCount, int startVertex) {
cc_uint32 offset = startVertex * SIZEOF_VERTEX_TEXTURED;
@ -1115,77 +1188,6 @@ void Gfx_DrawIndexedTris_T2fC4b(int verticesCount, int startVertex) {
glTexCoordPointer(2, GL_FLOAT, SIZEOF_VERTEX_TEXTURED, (void*)(VB_PTR + offset + 16));
glDrawElements(GL_TRIANGLES, ICOUNT(verticesCount), GL_UNSIGNED_SHORT, IB_PTR);
}
/*########################################################################################################################*
*-------------------------------------------------------Compatibility-----------------------------------------------------*
*#########################################################################################################################*/
/* fake vertex buffer objects with client side pointers */
typedef struct fake_buffer { cc_uint8* data; } fake_buffer;
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_glBindBuffer(GLenum target, GLuint src) {
fake_buffer** buffer = fake_GetBuffer(target);
*buffer = (fake_buffer*)src;
}
static void APIENTRY fake_glDeleteBuffers(GLsizei n, const GLuint *buffers) {
Mem_Free((void*)buffers[0]);
}
static void APIENTRY fake_glGenBuffers(GLsizei n, GLuint *buffers) {
fake_buffer* buffer = (fake_buffer*)Mem_TryAlloc(1, sizeof(fake_buffer));
buffer->data = NULL;
buffers[0] = (GLuint)buffer;
}
static void APIENTRY fake_glBufferData(GLenum target, cc_uintptr size, const GLvoid* data, GLenum usage) {
fake_buffer* buffer = *fake_GetBuffer(target);
Mem_Free(buffer->data);
buffer->data = Mem_TryAlloc(size, 1);
if (data) Mem_Copy(buffer->data, data, size);
}
static void APIENTRY fake_glBufferSubData(GLenum target, cc_uintptr offset, cc_uintptr size, const GLvoid* data) {
fake_buffer* buffer = *fake_GetBuffer(target);
Mem_Copy(buffer->data, data, size);
}
static void GL_CheckSupport(void) {
static const struct DynamicLibSym coreVboFuncs[5] = {
DynamicLib_Sym2("glBindBuffer", glBindBuffer), DynamicLib_Sym2("glDeleteBuffers", glDeleteBuffers),
DynamicLib_Sym2("glGenBuffers", glGenBuffers), DynamicLib_Sym2("glBufferData", glBufferData),
DynamicLib_Sym2("glBufferSubData", glBufferSubData)
};
static const struct DynamicLibSym arbVboFuncs[5] = {
DynamicLib_Sym2("glBindBufferARB", glBindBuffer), DynamicLib_Sym2("glDeleteBuffersARB", glDeleteBuffers),
DynamicLib_Sym2("glGenBuffersARB", glGenBuffers), DynamicLib_Sym2("glBufferDataARB", glBufferData),
DynamicLib_Sym2("glBufferSubDataARB", glBufferSubData)
};
static const cc_string vboExt = String_FromConst("GL_ARB_vertex_buffer_object");
cc_string extensions = String_FromReadonly((const char*)glGetString(GL_EXTENSIONS));
const GLubyte* ver = glGetString(GL_VERSION);
/* Version string is always: x.y. (and whatever afterwards) */
int major = ver[0] - '0', minor = ver[2] - '0';
/* Supported in core since 1.5 */
if (major > 1 || (major == 1 && minor >= 5)) {
GLContext_GetAll(coreVboFuncs, Array_Elems(coreVboFuncs));
} else if (String_CaselessContains(&extensions, &vboExt)) {
GLContext_GetAll(arbVboFuncs, Array_Elems(arbVboFuncs));
} else {
Logger_Abort("Only OpenGL 1.1 supported.\n\n" \
"Compile the game with CC_BUILD_GL11, or ask on the ClassiCube forums for it");
_glBindBuffer = fake_glBindBuffer; _glDeleteBuffers = fake_glDeleteBuffers;
_glGenBuffers = fake_glGenBuffers; _glBufferData = fake_glBufferData;
_glBufferSubData = fake_glBufferSubData;
}
customMipmapsLevels = true;
}
#endif /* !CC_BUILD_GL11 */
#endif /* !CC_BUILD_GLMODERN */
#endif

6
src/MapRenderer.c
View File

@ -95,7 +95,7 @@ static void CheckWeather(double delta) {
}
#ifdef CC_BUILD_GL11
#define DrawFace(face, ign) Gfx_DrawIndexedTris_T2fC4b(part.Vbs[face], 0);
#define DrawFace(face, ign) Gfx_BindVb(part.Vbs[face]); Gfx_DrawIndexedTris_T2fC4b(0, 0);
#define DrawFaces(f1, f2, ign) DrawFace(f1, ign); DrawFace(f2, ign);
#else
#define DrawFace(face, offset) Gfx_DrawIndexedTris_T2fC4b(part.Counts[face], offset);
@ -132,7 +132,7 @@ static void RenderNormalBatch(int batch) {
hasNormParts[batch] = true;
#ifndef CC_BUILD_GL11
Gfx_BindVb_T2fC4b(info->Vb);
Gfx_BindVb_Textured(info->Vb);
#endif
offset = part.Offset + part.SpriteCount;
@ -236,7 +236,7 @@ static void RenderTranslucentBatch(int batch) {
hasTranParts[batch] = true;
#ifndef CC_BUILD_GL11
Gfx_BindVb_T2fC4b(info->Vb);
Gfx_BindVb_Textured(info->Vb);
#endif
offset = part.Offset;