src/egl/main/eglconfigutil.c

   1 /**
   2  * Extra utility functions related to EGL configs.
   3  */
   4
   5
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <string.h>
   9 #include "eglconfigutil.h"
  10 #include "egllog.h"
  11
  12
  13 /**
  14  * Convert an _EGLConfig to a __GLcontextModes object.
  15  * NOTE: This routine may be incomplete - we're only making sure that
  16  * the fields needed by Mesa (for _mesa_create_context/framebuffer) are
  17  * set correctly.
  18  */
  19 void
  20 _eglConfigToContextModesRec(const _EGLConfig *config, __GLcontextModes *mode)
  21 {
  22    memset(mode, 0, sizeof(*mode));
  23
  24    mode->rgbMode = GL_TRUE; /* no color index */
  25    mode->colorIndexMode = GL_FALSE;
  26    mode->doubleBufferMode = GL_TRUE;  /* always DB for now */
  27    mode->stereoMode = GL_FALSE;
  28
  29    mode->redBits = GET_CONFIG_ATTRIB(config, EGL_RED_SIZE);
  30    mode->greenBits = GET_CONFIG_ATTRIB(config, EGL_GREEN_SIZE);
  31    mode->blueBits = GET_CONFIG_ATTRIB(config, EGL_BLUE_SIZE);
  32    mode->alphaBits = GET_CONFIG_ATTRIB(config, EGL_ALPHA_SIZE);
  33    mode->rgbBits = GET_CONFIG_ATTRIB(config, EGL_BUFFER_SIZE);
  34
  35    /* no rgba masks - fix? */
  36
  37    mode->depthBits = GET_CONFIG_ATTRIB(config, EGL_DEPTH_SIZE);
  38    mode->haveDepthBuffer = mode->depthBits > 0;
  39
  40    mode->stencilBits = GET_CONFIG_ATTRIB(config, EGL_STENCIL_SIZE);
  41    mode->haveStencilBuffer = mode->stencilBits > 0;
  42
  43    /* no accum */
  44
  45    mode->level = GET_CONFIG_ATTRIB(config, EGL_LEVEL);
  46    mode->samples = GET_CONFIG_ATTRIB(config, EGL_SAMPLES);
  47    mode->sampleBuffers = GET_CONFIG_ATTRIB(config, EGL_SAMPLE_BUFFERS);
  48
  49    /* surface type - not really needed */
  50    mode->visualType = GLX_TRUE_COLOR;
  51    mode->renderType = GLX_RGBA_BIT;
  52 }
  53
  54
  55 /**
  56  * Convert a __GLcontextModes object to an _EGLConfig.
  57  */
  58 EGLBoolean
  59 _eglConfigFromContextModesRec(_EGLConfig *conf, const __GLcontextModes *m,
  60                               EGLint conformant, EGLint renderable_type)
  61 {
  62    EGLint config_caveat, surface_type;
  63
  64    /* must be RGBA */
  65    if (!m->rgbMode || !(m->renderType & GLX_RGBA_BIT))
  66       return EGL_FALSE;
  67
  68    config_caveat = EGL_NONE;
  69    if (m->visualRating == GLX_SLOW_CONFIG)
  70       config_caveat = EGL_SLOW_CONFIG;
  71
  72    if (m->visualRating == GLX_NON_CONFORMANT_CONFIG)
  73       conformant &= ~EGL_OPENGL_BIT;
  74    if (!(conformant & EGL_OPENGL_ES_BIT))
  75       config_caveat = EGL_NON_CONFORMANT_CONFIG;
  76
  77    surface_type = 0;
  78    if (m->drawableType & GLX_WINDOW_BIT)
  79       surface_type |= EGL_WINDOW_BIT;
  80    if (m->drawableType & GLX_PIXMAP_BIT)
  81       surface_type |= EGL_PIXMAP_BIT;
  82    if (m->drawableType & GLX_PBUFFER_BIT)
  83       surface_type |= EGL_PBUFFER_BIT;
  84
  85    SET_CONFIG_ATTRIB(conf, EGL_BUFFER_SIZE, m->rgbBits);
  86    SET_CONFIG_ATTRIB(conf, EGL_RED_SIZE, m->redBits);
  87    SET_CONFIG_ATTRIB(conf, EGL_GREEN_SIZE, m->greenBits);
  88    SET_CONFIG_ATTRIB(conf, EGL_BLUE_SIZE, m->blueBits);
  89    SET_CONFIG_ATTRIB(conf, EGL_ALPHA_SIZE, m->alphaBits);
  90
  91    SET_CONFIG_ATTRIB(conf, EGL_BIND_TO_TEXTURE_RGB, m->bindToTextureRgb);
  92    SET_CONFIG_ATTRIB(conf, EGL_BIND_TO_TEXTURE_RGBA, m->bindToTextureRgba);
  93    SET_CONFIG_ATTRIB(conf, EGL_COLOR_BUFFER_TYPE, EGL_RGB_BUFFER);
  94    SET_CONFIG_ATTRIB(conf, EGL_CONFIG_CAVEAT, config_caveat);
  95
  96    SET_CONFIG_ATTRIB(conf, EGL_CONFORMANT, conformant);
  97    SET_CONFIG_ATTRIB(conf, EGL_DEPTH_SIZE, m->depthBits);
  98    SET_CONFIG_ATTRIB(conf, EGL_LEVEL, m->level);
  99    SET_CONFIG_ATTRIB(conf, EGL_MAX_PBUFFER_WIDTH, m->maxPbufferWidth);
 100    SET_CONFIG_ATTRIB(conf, EGL_MAX_PBUFFER_HEIGHT, m->maxPbufferHeight);
 101    SET_CONFIG_ATTRIB(conf, EGL_MAX_PBUFFER_PIXELS, m->maxPbufferPixels);
 102
 103    SET_CONFIG_ATTRIB(conf, EGL_NATIVE_RENDERABLE, m->xRenderable);
 104    SET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_ID, m->visualID);
 105
 106    if (m->visualType != GLX_NONE)
 107       SET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_TYPE, m->visualType);
 108    else
 109       SET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_TYPE, EGL_NONE);
 110
 111    SET_CONFIG_ATTRIB(conf, EGL_RENDERABLE_TYPE, renderable_type);
 112    SET_CONFIG_ATTRIB(conf, EGL_SAMPLE_BUFFERS, m->sampleBuffers);
 113    SET_CONFIG_ATTRIB(conf, EGL_SAMPLES, m->samples);
 114    SET_CONFIG_ATTRIB(conf, EGL_STENCIL_SIZE, m->stencilBits);
 115
 116    SET_CONFIG_ATTRIB(conf, EGL_SURFACE_TYPE, surface_type);
 117
 118    /* what to do with GLX_TRANSPARENT_INDEX? */
 119    if (m->transparentPixel == GLX_TRANSPARENT_RGB) {
 120       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_TYPE, EGL_TRANSPARENT_RGB);
 121       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_RED_VALUE, m->transparentRed);
 122       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_GREEN_VALUE, m->transparentGreen);
 123       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_BLUE_VALUE, m->transparentBlue);
 124    }
 125    else {
 126       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_TYPE, EGL_NONE);
 127    }
 128
 129    return EGL_TRUE;
 130 }