ReactOS  0.4.14-dev-583-g2a1ba2c
scissor.h File Reference
#include "types.h"
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Functions

void gl_Scissor (GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height)
 
GLint gl_scissor_span (GLcontext *ctx, GLuint n, GLint x, GLint y, GLubyte mask[])
 
GLuint gl_scissor_pixels (GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], GLubyte mask[])
 

Function Documentation

◆ gl_Scissor()

void gl_Scissor ( GLcontext ctx,
GLint  x,
GLint  y,
GLsizei  width,
GLsizei  height 
)

Definition at line 58 of file scissor.c.

60 {
61  if (width<0 || height<0) {
62  gl_error( ctx, GL_INVALID_VALUE, "glScissor" );
63  return;
64  }
65  if (INSIDE_BEGIN_END(ctx)) {
66  gl_error( ctx, GL_INVALID_OPERATION, "glBegin" );
67  return;
68  }
69 
70  if (x!=ctx->Scissor.X || y!=ctx->Scissor.Y ||
71  width!=ctx->Scissor.Width || height!=ctx->Scissor.Height) {
72  ctx->Scissor.X = x;
73  ctx->Scissor.Y = y;
74  ctx->Scissor.Width = width;
75  ctx->Scissor.Height = height;
76  ctx->NewState |= NEW_ALL; /* TODO: this is overkill */
77  }
78 }
GLint GLint GLsizei width
Definition: gl.h:1546
GLuint NewState
Definition: types.h:1355
GLint GLint GLint GLint GLint x
Definition: gl.h:1548
#define INSIDE_BEGIN_END(CTX)
Definition: macros.h:135
struct gl_scissor_attrib Scissor
Definition: types.h:1332
#define NEW_ALL
Definition: types.h:1236
#define GL_INVALID_VALUE
Definition: gl.h:695
#define GL_INVALID_OPERATION
Definition: gl.h:696
GLint GLint GLsizei GLsizei height
Definition: gl.h:1546
void gl_error(GLcontext *ctx, GLenum error, const char *s)
Definition: context.c:1421
GLint GLint GLint GLint GLint GLint y
Definition: gl.h:1548

Referenced by execute_list(), and init_exec_pointers().

◆ gl_scissor_pixels()

GLuint gl_scissor_pixels ( GLcontext ctx,
GLuint  n,
const GLint  x[],
const GLint  y[],
GLubyte  mask[] 
)

Definition at line 116 of file scissor.c.

119 {
120  GLint xmin = ctx->Buffer->Xmin;
121  GLint xmax = ctx->Buffer->Xmax;
122  GLint ymin = ctx->Buffer->Ymin;
123  GLint ymax = ctx->Buffer->Ymax;
124  GLuint i;
125 
126  for (i=0;i<n;i++) {
127  mask[i] &= (x[i]>=xmin) & (x[i]<=xmax) & (y[i]>=ymin) & (y[i]<=ymax);
128  }
129 
130  return 1;
131 }
GLframebuffer * Buffer
Definition: types.h:1273
GLint Ymin
Definition: types.h:1195
GLdouble n
Definition: glext.h:7729
GLint GLint GLint GLint GLint x
Definition: gl.h:1548
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
GLenum GLint GLuint mask
Definition: glext.h:6028
GLint Xmin
Definition: types.h:1195
GLint Ymax
Definition: types.h:1195
unsigned int GLuint
Definition: gl.h:159
GLint GLint GLint GLint GLint GLint y
Definition: gl.h:1548
int GLint
Definition: gl.h:156
GLint Xmax
Definition: types.h:1195

◆ gl_scissor_span()

GLint gl_scissor_span ( GLcontext ctx,
GLuint  n,
GLint  x,
GLint  y,
GLubyte  mask[] 
)

Definition at line 87 of file scissor.c.

89 {
90  /* first check if whole span is outside the scissor box */
91  if (y<ctx->Buffer->Ymin || y>ctx->Buffer->Ymax
92  || x>ctx->Buffer->Xmax || x+(GLint)n-1<ctx->Buffer->Xmin) {
93  return 0;
94  }
95  else {
96  GLint i;
97  GLint xMin = ctx->Buffer->Xmin;
98  GLint xMax = ctx->Buffer->Xmax;
99  for (i=0; x+i < xMin; i++) {
100  mask[i] = 0;
101  }
102  for (i=(GLint)n-1; x+i > xMax; i--) {
103  mask[i] = 0;
104  }
105 
106  return 1;
107  }
108 }
GLframebuffer * Buffer
Definition: types.h:1273
GLdouble n
Definition: glext.h:7729
GLint GLint GLint GLint GLint x
Definition: gl.h:1548
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
GLenum GLint GLuint mask
Definition: glext.h:6028
Definition: bufpool.h:45
GLint Xmin
Definition: types.h:1195
GLint Ymax
Definition: types.h:1195
GLint GLint GLint GLint GLint GLint y
Definition: gl.h:1548
int GLint
Definition: gl.h:156
GLint Xmax
Definition: types.h:1195

Referenced by gl_write_color_span(), gl_write_index_span(), gl_write_monocolor_span(), gl_write_monoindex_span(), and gl_write_texture_span().