thirdparty/scummvm
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TINYGL: Implemented deferred 3D draw calls.

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This commit is contained in:
Stefano Musumeci 2014-07-24 19:50:11 +02:00
parent 7df4a3efa9
commit f0de01af01
1 changed files with 12 additions and 24 deletions
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36
graphics/tinygl/vertex.cpp
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@ -1,5 +1,6 @@
#include "graphics/tinygl/zgl.h"
#include "graphics/tinygl/zrect.h"
namespace TinyGL {
@ -220,7 +221,6 @@ void glopVertex(GLContext *c, GLParam *p) {
// edge flag
v->edge_flag = c->current_edge_flag;
switch (c->begin_type) {
case TGL_POINTS:
gl_draw_point(c, &c->vertex[0]);
@ -237,14 +237,14 @@ void glopVertex(GLContext *c, GLParam *p) {
if (n == 1) {
c->vertex[2] = c->vertex[0];
} else if (n == 2) {
gl_draw_line(c, &c->vertex[0], &c->vertex[1]);
c->drawCallsQueue.push_back(new Graphics::RasterizationDrawCall());
c->vertex[0] = c->vertex[1];
n = 1;
}
break;
case TGL_TRIANGLES:
if (n == 3) {
gl_draw_triangle(c, &c->vertex[0], &c->vertex[1], &c->vertex[2]);
c->drawCallsQueue.push_back(new Graphics::RasterizationDrawCall());
n = 0;
}
break;
@ -252,38 +252,25 @@ void glopVertex(GLContext *c, GLParam *p) {
if (cnt >= 3) {
if (n == 3)
n = 0;
// needed to respect triangle orientation
switch (cnt & 1) {
case 0:
gl_draw_triangle(c, &c->vertex[2], &c->vertex[1], &c->vertex[0]);
break;
case 1:
gl_draw_triangle(c, &c->vertex[0], &c->vertex[1], &c->vertex[2]);
break;
}
c->drawCallsQueue.push_back(new Graphics::RasterizationDrawCall());
}
break;
case TGL_TRIANGLE_FAN:
if (n == 3) {
gl_draw_triangle(c, &c->vertex[0], &c->vertex[1], &c->vertex[2]);
c->drawCallsQueue.push_back(new Graphics::RasterizationDrawCall());
c->vertex[1] = c->vertex[2];
n = 2;
}
break;
case TGL_QUADS:
if (n == 4) {
c->vertex[2].edge_flag = 0;
gl_draw_triangle(c, &c->vertex[0], &c->vertex[1], &c->vertex[2]);
c->vertex[2].edge_flag = 1;
c->vertex[0].edge_flag = 0;
gl_draw_triangle(c, &c->vertex[0], &c->vertex[2], &c->vertex[3]);
c->drawCallsQueue.push_back(new Graphics::RasterizationDrawCall());
n = 0;
}
break;
case TGL_QUAD_STRIP:
if (n == 4) {
gl_draw_triangle(c, &c->vertex[0], &c->vertex[1], &c->vertex[2]);
gl_draw_triangle(c, &c->vertex[1], &c->vertex[3], &c->vertex[2]);
c->drawCallsQueue.push_back(new Graphics::RasterizationDrawCall());
for (int i = 0; i < 2; i++)
c->vertex[i] = c->vertex[i + 2];
n = 2;
@ -295,6 +282,7 @@ void glopVertex(GLContext *c, GLParam *p) {
error("glBegin: type %x not handled", c->begin_type);
}
c->vertex_n = n;
}
@ -303,15 +291,15 @@ void glopEnd(GLContext *c, GLParam *) {
if (c->begin_type == TGL_LINE_LOOP) {
if (c->vertex_cnt >= 3) {
gl_draw_line(c, &c->vertex[0], &c->vertex[2]);
c->drawCallsQueue.push_back(new Graphics::RasterizationDrawCall());
}
} else if (c->begin_type == TGL_POLYGON) {
int i = c->vertex_cnt;
while (i >= 3) {
i--;
gl_draw_triangle(c, &c->vertex[i], &c->vertex[0], &c->vertex[i - 1]);
if (i >= 3) {
c->drawCallsQueue.push_back(new Graphics::RasterizationDrawCall());
}
}
c->in_begin = 0;
}