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Use vertex arrays to draw in DrawPolygon for OpenGL.

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This should introduce a minor performance boost for slow CPUs in
OpenGL mode. If it doesn't, it shouldn't be any slower. It also puts
us a little closer to supporting GLES as well.

This introduces several new pgl function pointers that are from
GL 1.1. I do not check for their existence because no driver out in
the wild in active use doesn't support 1.1.
This commit is contained in:
Ronald Kinard 2015-03-08 23:32:15 -05:00
parent 80bde9e042
commit fe7d19cc57
1 changed files with 54 additions and 9 deletions
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63
src/hardware/r_opengl/r_opengl.c
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@ -185,7 +185,9 @@ FUNCPRINTF void DBG_Printf(const char *lpFmt, ...)
#define pglPolygonOffset glPolygonOffset
#define pglScissor glScissor
#define pglEnable glEnable
#define pglEnableClientState glEnableClientState
#define pglDisable glDisable
#define pglDisableClientState glDisableClientState
#define pglGetDoublev glGetDoublev
//glGetIntegerv
//glGetString
@ -218,6 +220,16 @@ FUNCPRINTF void DBG_Printf(const char *lpFmt, ...)
#define pglColor4fv glColor4fv
#define pglTexCoord2f glTexCoord2f
/* Drawing Functions (arrays) */
#define pglVertexPointer glVertexPointer
#define pglNormalPointer glNormalPointer
#define pglColorPointer glColorPointer
#define pglIndexPointer glIndexPointer
#define pglTexCoordPointer glTexCoordPointer
#define pglEdgeFlagPointer glEdgeFlagPointer
#define pglDrawArrays glDrawArrays
#define pglDrawElements glDrawElements
/* Lighting */
#define pglShadeModel glShadeModel
#define pglLightfv glLightfv
@ -271,8 +283,12 @@ typedef void (APIENTRY * PFNglScissor) (GLint x, GLint y, GLsizei width, GLsizei
static PFNglScissor pglScissor;
typedef void (APIENTRY * PFNglEnable) (GLenum cap);
static PFNglEnable pglEnable;
typedef void (APIENTRY * PFNglEnableClientState) (GLenum cap);
static PFNglEnableClientState pglEnableClientState;
typedef void (APIENTRY * PFNglDisable) (GLenum cap);
static PFNglDisable pglDisable;
typedef void (APIENTRY * PFNglDisableClientState) (GLenum cap);
static PFNglDisableClientState pglDisableClientState;
typedef void (APIENTRY * PFNglGetDoublev) (GLenum pname, GLdouble *params);
static PFNglGetDoublev pglGetDoublev;
//glGetIntegerv
@ -326,6 +342,24 @@ static PFNglColor4fv pglColor4fv;
typedef void (APIENTRY * PFNglTexCoord2f) (GLfloat s, GLfloat t);
static PFNglTexCoord2f pglTexCoord2f;
/* Drawing Functions (arrays) */
typedef void (APIENTRY * PFNglVertexPointer) (GLint size, GLenum type, GLsizei stride, const GLvoid * pointer);
static PFNglVertexPointer pglVertexPointer;
typedef void (APIENTRY * PFNglNormalPointer) (GLenum type, GLsizei stride, const GLvoid * pointer);
static PFNglNormalPointer pglNormalPointer;
typedef void (APIENTRY * PFNglColorPointer) (GLint size, GLenum type, GLsizei stride, const GLvoid * pointer);
static PFNglColorPointer pglColorPointer;
typedef void (APIENTRY * PFNglIndexPointer) (GLenum type, GLsizei stride, const GLvoid * pointer);
static PFNglIndexPointer pglIndexPointer;
typedef void (APIENTRY * PFNglTexCoordPointer) (GLint size, GLenum type, GLsizei stride, const GLvoid * pointer);
static PFNglTexCoordPointer pglTexCoordPointer;
typedef void (APIENTRY * PFNglEdgeFlagPointer) (GLsizei stride, const GLvoid * pointer);
static PFNglEdgeFlagPointer pglEdgeFlagPointer;
typedef void (APIENTRY * PFNglDrawArrays) (GLenum mode, GLint first, GLsizei count);
static PFNglDrawArrays pglDrawArrays;
typedef void (APIENTRY * PFNglDrawElements) (GLenum mode, GLsizei count, GLenum type, const GLvoid * indices);
static PFNglDrawElements pglDrawElements;
/* Lighting */
typedef void (APIENTRY * PFNglShadeModel) (GLenum mode);
static PFNglShadeModel pglShadeModel;
@ -416,7 +450,9 @@ boolean SetupGLfunc(void)
GETOPENGLFUNC(pglPolygonOffset , glPolygonOffset)
GETOPENGLFUNC(pglScissor , glScissor)
GETOPENGLFUNC(pglEnable , glEnable)
GETOPENGLFUNC(pglEnableClientState, glEnableClientState);
GETOPENGLFUNC(pglDisable , glDisable)
GETOPENGLFUNC(pglDisableClientState, glDisableClientState);
GETOPENGLFUNC(pglGetDoublev , glGetDoublev)
GETOPENGLFUNC(pglGetIntegerv , glGetIntegerv)
GETOPENGLFUNC(pglGetString , glGetString)
@ -445,6 +481,14 @@ boolean SetupGLfunc(void)
GETOPENGLFUNC(pglColor4fv , glColor4fv)
GETOPENGLFUNC(pglTexCoord2f , glTexCoord2f)
GETOPENGLFUNC(pglVertexPointer, glVertexPointer)
GETOPENGLFUNC(pglNormalPointer, glNormalPointer)
GETOPENGLFUNC(pglColorPointer, glColorPointer)
GETOPENGLFUNC(pglTexCoordPointer, glTexCoordPointer)
GETOPENGLFUNC(pglEdgeFlagPointer, glEdgeFlagPointer)
GETOPENGLFUNC(pglDrawArrays, glDrawArrays)
GETOPENGLFUNC(pglDrawElements, glDrawElements)
GETOPENGLFUNC(pglShadeModel , glShadeModel)
GETOPENGLFUNC(pglLightfv, glLightfv)
GETOPENGLFUNC(pglLightModelfv , glLightModelfv)
@ -1296,6 +1340,7 @@ EXPORT void HWRAPI(DrawPolygon) (FSurfaceInfo *pSurf,
FUINT i;
FUINT j;
GLRGBAFloat c = {0,0,0,0};
FUINT stride;
if ((PolyFlags & PF_Corona) && (oglflags & GLF_NOZBUFREAD))
PolyFlags &= ~(PF_NoDepthTest|PF_Corona);
@ -1375,15 +1420,15 @@ EXPORT void HWRAPI(DrawPolygon) (FSurfaceInfo *pSurf,
if (PolyFlags & PF_MD2)
return;
pglBegin(GL_TRIANGLE_FAN);
for (i = 0; i < iNumPts; i++)
{
pglTexCoord2f(pOutVerts[i].sow, pOutVerts[i].tow);
//Hurdler: test code: -pOutVerts[i].z => pOutVerts[i].z
pglVertex3f(pOutVerts[i].x, pOutVerts[i].y, pOutVerts[i].z);
//pglVertex3f(pOutVerts[i].x, pOutVerts[i].y, -pOutVerts[i].z);
}
pglEnd();
stride = sizeof(FUINT) + sizeof(FLOAT) + sizeof(FLOAT);
pglEnableClientState(GL_VERTEX_ARRAY);
pglEnableClientState(GL_TEXTURE_COORD_ARRAY);
pglVertexPointer(3, GL_FLOAT, sizeof(FOutVector), &pOutVerts[0].x);
pglTexCoordPointer(2, GL_FLOAT, sizeof(FOutVector), &pOutVerts[0].sow);
pglDrawArrays(GL_TRIANGLE_FAN, 0, iNumPts);
pglDisableClientState(GL_TEXTURE_COORD_ARRAY);
pglDisableClientState(GL_VERTEX_ARRAY);
if (PolyFlags & PF_RemoveYWrap)
pglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);