diff options
Diffstat (limited to 'cogl/driver/gles/cogl-texture-driver.c')
| -rw-r--r-- | cogl/driver/gles/cogl-texture-driver.c | 217 |
1 files changed, 8 insertions, 209 deletions
diff --git a/cogl/driver/gles/cogl-texture-driver.c b/cogl/driver/gles/cogl-texture-driver.c index 1d50a198..0461ae8d 100644 --- a/cogl/driver/gles/cogl-texture-driver.c +++ b/cogl/driver/gles/cogl-texture-driver.c @@ -128,217 +128,16 @@ _cogl_texture_driver_upload_subregion_to_gl (CoglTexture *tex, g_free (slice_bmp.data); } -static void -_cogl_texture_draw_and_read (CoglTexture *tex, - CoglBitmap *target_bmp, - GLint *viewport) -{ - gint bpp; - float rx1, ry1; - float rx2, ry2; - float tx1, ty1; - float tx2, ty2; - int bw, bh; - CoglBitmap rect_bmp; - CoglHandle handle; - - handle = (CoglHandle) tex; - bpp = _cogl_get_format_bpp (COGL_PIXEL_FORMAT_RGBA_8888); - - ry1 = 0; ry2 = 0; - ty1 = 0; ty2 = 0; - - /* Walk Y axis until whole bitmap height consumed */ - for (bh = tex->bitmap.height; bh > 0; bh -= viewport[3]) - { - /* Rectangle Y coords */ - ry1 = ry2; - ry2 += (bh < viewport[3]) ? bh : viewport[3]; - - /* Normalized texture Y coords */ - ty1 = ty2; - ty2 = (ry2 / (float)tex->bitmap.height); - - rx1 = 0; rx2 = 0; - tx1 = 0; tx2 = 0; - - /* Walk X axis until whole bitmap width consumed */ - for (bw = tex->bitmap.width; bw > 0; bw-=viewport[2]) - { - /* Rectangle X coords */ - rx1 = rx2; - rx2 += (bw < viewport[2]) ? bw : viewport[2]; - - /* Normalized texture X coords */ - tx1 = tx2; - tx2 = (rx2 / (float)tex->bitmap.width); - - /* Draw a portion of texture */ - cogl_rectangle_with_texture_coords (0, 0, - rx2 - rx1, - ry2 - ry1, - tx1, ty1, - tx2, ty2); - - /* Read into a temporary bitmap */ - rect_bmp.format = COGL_PIXEL_FORMAT_RGBA_8888; - rect_bmp.width = rx2 - rx1; - rect_bmp.height = ry2 - ry1; - rect_bmp.rowstride = bpp * rect_bmp.width; - rect_bmp.data = (guchar*) g_malloc (rect_bmp.rowstride * - rect_bmp.height); - - _cogl_texture_driver_prep_gl_for_pixels_download (rect_bmp.rowstride, - bpp); - GE( glReadPixels (viewport[0], viewport[1], - rect_bmp.width, - rect_bmp.height, - GL_RGBA, GL_UNSIGNED_BYTE, - rect_bmp.data) ); - - /* Copy to target bitmap */ - _cogl_bitmap_copy_subregion (&rect_bmp, - target_bmp, - 0,0, - rx1,ry1, - rect_bmp.width, - rect_bmp.height); - - /* Free temp bitmap */ - g_free (rect_bmp.data); - } - } -} - +/* NB: GLES doesn't support glGetTexImage2D, so cogl-texture will instead + * fallback to a generic render + readpixels approach to downloading + * texture data. (See _cogl_texture_draw_and_read() ) */ gboolean -_cogl_texture_driver_download_from_gl (CoglTexture *tex, - CoglBitmap *target_bmp, - GLuint target_gl_format, - GLuint target_gl_type) +_cogl_texture_driver_gl_get_tex_image (GLenum gl_target, + GLenum dest_gl_format, + GLenum dest_gl_type, + guint8 *dest) { - gint bpp; - GLint viewport[4]; - CoglBitmap alpha_bmp; - CoglHandle prev_source; - - _COGL_GET_CONTEXT (ctx, FALSE); - - - bpp = _cogl_get_format_bpp (COGL_PIXEL_FORMAT_RGBA_8888); - - /* Viewport needs to have some size and be inside the window for this */ - GE( glGetIntegerv (GL_VIEWPORT, viewport) ); - - if (viewport[0] < 0 || viewport[1] < 0 || - viewport[2] <= 0 || viewport[3] <= 0) - return FALSE; - - /* Setup orthographic projection into current viewport - (0,0 in bottom-left corner to draw the texture - upside-down so we match the way glReadPixels works) */ - - _cogl_set_current_matrix (COGL_MATRIX_PROJECTION); - _cogl_current_matrix_push (); - _cogl_current_matrix_identity (); - - _cogl_current_matrix_ortho (0, (float)(viewport[2]), - 0, (float)(viewport[3]), - (float)(0), - (float)(100)); - - _cogl_set_current_matrix (COGL_MATRIX_MODELVIEW); - _cogl_current_matrix_push (); - _cogl_current_matrix_identity (); - - /* Direct copy operation */ - - if (ctx->drv.texture_download_material == COGL_INVALID_HANDLE) - { - ctx->drv.texture_download_material = cogl_material_new (); - cogl_material_set_blend (ctx->drv.texture_download_material, - "RGBA = ADD (SRC_COLOR, 0)", - NULL); - } - - prev_source = cogl_handle_ref (ctx->source_material); - cogl_set_source (ctx->drv.texture_download_material); - - cogl_material_set_layer (ctx->drv.texture_download_material, 0, tex); - - cogl_material_set_layer_combine (ctx->drv.texture_download_material, - 0, /* layer */ - "RGBA = REPLACE (TEXTURE)", - NULL); - - _cogl_texture_draw_and_read (tex, target_bmp, viewport); - - /* Check whether texture has alpha and framebuffer not */ - /* FIXME: For some reason even if ALPHA_BITS is 8, the framebuffer - still doesn't seem to have an alpha buffer. This might be just - a PowerVR issue. - GLint r_bits, g_bits, b_bits, a_bits; - GE( glGetIntegerv (GL_ALPHA_BITS, &a_bits) ); - GE( glGetIntegerv (GL_RED_BITS, &r_bits) ); - GE( glGetIntegerv (GL_GREEN_BITS, &g_bits) ); - GE( glGetIntegerv (GL_BLUE_BITS, &b_bits) ); - printf ("R bits: %d\n", r_bits); - printf ("G bits: %d\n", g_bits); - printf ("B bits: %d\n", b_bits); - printf ("A bits: %d\n", a_bits); */ - if ((tex->bitmap.format & COGL_A_BIT)/* && a_bits == 0*/) - { - guchar *srcdata; - guchar *dstdata; - guchar *srcpixel; - guchar *dstpixel; - gint x,y; - - /* Create temp bitmap for alpha values */ - alpha_bmp.format = COGL_PIXEL_FORMAT_RGBA_8888; - alpha_bmp.width = target_bmp->width; - alpha_bmp.height = target_bmp->height; - alpha_bmp.rowstride = bpp * alpha_bmp.width; - alpha_bmp.data = (guchar*) g_malloc (alpha_bmp.rowstride * - alpha_bmp.height); - - /* Draw alpha values into RGB channels */ - cogl_material_set_layer_combine (ctx->drv.texture_download_material, - 0, /* layer */ - "RGBA = REPLACE (TEXTURE[A])", - NULL); - - _cogl_texture_draw_and_read (tex, &alpha_bmp, viewport); - - /* Copy temp R to target A */ - srcdata = alpha_bmp.data; - dstdata = target_bmp->data; - - for (y=0; y<target_bmp->height; ++y) - { - for (x=0; x<target_bmp->width; ++x) - { - srcpixel = srcdata + x*bpp; - dstpixel = dstdata + x*bpp; - dstpixel[3] = srcpixel[0]; - } - srcdata += alpha_bmp.rowstride; - dstdata += target_bmp->rowstride; - } - - g_free (alpha_bmp.data); - } - - /* Restore old state */ - _cogl_set_current_matrix (COGL_MATRIX_PROJECTION); - _cogl_current_matrix_pop (); - _cogl_set_current_matrix (COGL_MATRIX_MODELVIEW); - _cogl_current_matrix_pop (); - - /* restore the original material */ - cogl_set_source (prev_source); - cogl_handle_unref (prev_source); - - return TRUE; + return FALSE; } gboolean |