ref: 3d80174a853f38ae9501774ae9946cd87d520c36
dir: /src/misc.c/
#include "msghandling.h"
#include "zgl.h"
void glPolygonStipple(void* a) {
#if TGL_FEATURE_POLYGON_STIPPLE == 1
GLContext* c = gl_get_context();
#include "error_check.h"
ZBuffer* zb = c->zb;
memcpy(zb->stipplepattern, a, TGL_POLYGON_STIPPLE_BYTES);
for (GLint i = 0; i < TGL_POLYGON_STIPPLE_BYTES; i++) {
zb->stipplepattern[i] = ((GLubyte*)a)[i];
}
#endif
}
void glopViewport(GLParam* p) {
GLContext* c = gl_get_context();
GLint xsize, ysize, xmin, ymin, xsize_req, ysize_req;
xmin = p[1].i;
ymin = p[2].i;
xsize = p[3].i;
ysize = p[4].i;
/* we may need to resize the zbuffer */
if (c->viewport.xmin != xmin || c->viewport.ymin != ymin || c->viewport.xsize != xsize || c->viewport.ysize != ysize) {
xsize_req = xmin + xsize;
ysize_req = ymin + ysize;
if (c->gl_resize_viewport && c->gl_resize_viewport(&xsize_req, &ysize_req) != 0) {
gl_fatal_error("glViewport: error while resizing display");
}
if (xsize <= 0 || ysize <= 0) {
gl_fatal_error("glViewport: size too small");
}
c->viewport.xmin = xmin;
c->viewport.ymin = ymin;
c->viewport.xsize = xsize;
c->viewport.ysize = ysize;
gl_eval_viewport();
}
}
void glBlendFunc(GLenum sfactor, GLenum dfactor) {
GLParam p[3];
#include "error_check_no_context.h"
p[0].op = OP_BlendFunc;
p[1].i = sfactor;
p[2].i = dfactor;
gl_add_op(p);
return;
}
void glopBlendFunc(GLParam* p) {
GLContext* c = gl_get_context();
c->zb->sfactor = p[1].i;
c->zb->dfactor = p[2].i;
}
void glBlendEquation(GLenum mode) {
GLParam p[2];
#include "error_check_no_context.h"
p[0].op = OP_BlendEquation;
p[1].i = mode;
gl_add_op(p);
}
void glopBlendEquation(GLParam* p) {
GLContext* c = gl_get_context();
c->zb->blendeq = p[1].i;
}
void glopPointSize(GLParam* p) {
GLContext* c = gl_get_context();
c->zb->pointsize = p[1].f;
}
void glPointSize(GLfloat f) {
GLParam p[2];
p[0].op = OP_PointSize;
#include "error_check_no_context.h"
p[1].f = f;
gl_add_op(p);
}
void glopEnableDisable(GLParam* p) {
GLContext* c = gl_get_context();
GLint code = p[1].i;
GLint v = p[2].i;
switch (code) {
case GL_CULL_FACE:
c->cull_face_enabled = v;
break;
case GL_LIGHTING:
c->lighting_enabled = v;
break;
case GL_COLOR_MATERIAL:
c->color_material_enabled = v;
break;
case GL_TEXTURE_2D:
c->texture_2d_enabled = v;
break;
case GL_BLEND:
c->zb->enable_blend = v;
break;
case GL_NORMALIZE:
c->normalize_enabled = v;
break;
case GL_DEPTH_TEST:
c->zb->depth_test = v;
break;
case GL_POLYGON_OFFSET_FILL:
if (v)
c->offset_states |= TGL_OFFSET_FILL;
else
c->offset_states &= ~TGL_OFFSET_FILL;
break;
case GL_POLYGON_STIPPLE:
#if TGL_FEATURE_POLYGON_STIPPLE == 1
c->zb->dostipple = v;
#endif
break;
case GL_POLYGON_OFFSET_POINT:
if (v)
c->offset_states |= TGL_OFFSET_POINT;
else
c->offset_states &= ~TGL_OFFSET_POINT;
break;
case GL_POLYGON_OFFSET_LINE:
if (v)
c->offset_states |= TGL_OFFSET_LINE;
else
c->offset_states &= ~TGL_OFFSET_LINE;
break;
default:
if (code >= GL_LIGHT0 && code < GL_LIGHT0 + MAX_LIGHTS) {
gl_enable_disable_light(code - GL_LIGHT0, v);
} else {
tgl_warning("glEnableDisable: 0x%X not supported.\n", code);
}
break;
}
}
void glopShadeModel(GLParam* p) {
GLContext* c = gl_get_context();
GLint code = p[1].i;
c->current_shade_model = code;
}
void glopCullFace(GLParam* p) {
GLContext* c = gl_get_context();
GLint code = p[1].i;
c->current_cull_face = code;
}
void glopFrontFace(GLParam* p) {
GLContext* c = gl_get_context();
GLint code = p[1].i;
c->current_front_face = code;
}
void glopPolygonMode(GLParam* p) {
GLContext* c = gl_get_context();
GLint face = p[1].i;
GLint mode = p[2].i;
switch (face) {
case GL_BACK:
c->polygon_mode_back = mode;
break;
case GL_FRONT:
c->polygon_mode_front = mode;
break;
case GL_FRONT_AND_BACK:
c->polygon_mode_front = mode;
c->polygon_mode_back = mode;
break;
default:
break;
}
}
void glopPolygonOffset(GLParam* p) {
GLContext* c = gl_get_context();
c->offset_factor = p[1].f;
c->offset_units = p[2].f;
}
GLenum glGetError() {
#if TGL_FEATURE_ERROR_CHECK == 1
GLContext* c = gl_get_context();
GLenum eflag = c->error_flag;
if (eflag != GL_OUT_OF_MEMORY)
c->error_flag = GL_NO_ERROR;
return eflag;
#else
return GL_NO_ERROR;
#endif
}
void glDrawBuffer(GLenum mode) {
GLContext* c = gl_get_context();
#include "error_check.h"
if ((mode != GL_FRONT && mode != GL_NONE) || c->in_begin) {
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_INVALID_OPERATION
#include "error_check.h"
#else
return;
#endif
}
c->drawbuffer = mode;
}
void glReadBuffer(GLenum mode) {
GLContext* c = gl_get_context();
#include "error_check.h"
if ((mode != GL_FRONT && mode != GL_NONE) || c->in_begin) {
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_INVALID_OPERATION
#include "error_check.h"
#else
return;
#endif
}
c->readbuffer = mode;
}
void glReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, void* data) {
GLContext* c = gl_get_context();
#include "error_check.h"
if (c->readbuffer != GL_FRONT || (format != GL_RGBA && format != GL_RGB && format != GL_DEPTH_COMPONENT) ||
#if TGL_FEATURE_RENDER_BITS == 32
(type != GL_UNSIGNED_INT && type != GL_UNSIGNED_INT_8_8_8_8)
#elif TGL_FEATURE_RENDER_BITS == 16
(type != GL_UNSIGNED_SHORT && type != GL_UNSIGNED_SHORT_5_6_5)
#else
#error "Unsupported TGL_FEATURE_RENDER_BITS"
#endif
) {
#if TGL_FEATURE_ERROR_CHECK
#define ERROR_FLAG GL_INVALID_OPERATION
#include "error_check.h"
#else
return;
#endif
}
/* TODO: implement read pixels.*/
}
void glFinish() { return; }