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e70071ff1d
This removes the call to cogl_framebuffer_swap_buffers in the test's paint() function since we shouldn't assume that the framebuffer is a CoglOnscreen framebuffer - in fact by default the framebuffer is offscreen. The swap was resulting in a crash since cogl_framebuffer_swap_buffers has started asserting that the given framebuffer is a CoglOnscreen. Reviewed-by: Neil Roberts <neil@linux.intel.com>
307 lines
8.9 KiB
C
307 lines
8.9 KiB
C
#include <cogl/cogl.h>
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#include <string.h>
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#include "test-utils.h"
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/* Size the texture so that it is just off a power of two to encourage
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it so use software tiling when NPOTs aren't available */
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#define TEXTURE_SIZE 257
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/* Amount of pixels to skip off the top, bottom, left and right of the
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texture when reading back the stage */
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#define TEST_INSET 4
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/* Size to actually render the texture at */
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#define TEXTURE_RENDER_SIZE 32
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typedef struct _TestState
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{
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CoglFramebuffer *fb;
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CoglHandle texture;
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CoglFramebuffer *offscreen;
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CoglHandle offscreen_tex;
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int width, height;
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} TestState;
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static gboolean
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validate_part (int xnum, int ynum, gboolean shown)
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{
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guchar *pixels, *p;
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gboolean ret = TRUE;
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pixels = g_malloc0 ((TEXTURE_RENDER_SIZE - TEST_INSET * 2)
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* (TEXTURE_RENDER_SIZE - TEST_INSET * 2) * 4);
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/* Read the appropriate part but skip out a few pixels around the
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edges */
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cogl_read_pixels (xnum * TEXTURE_RENDER_SIZE + TEST_INSET,
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ynum * TEXTURE_RENDER_SIZE + TEST_INSET,
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TEXTURE_RENDER_SIZE - TEST_INSET * 2,
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TEXTURE_RENDER_SIZE - TEST_INSET * 2,
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COGL_READ_PIXELS_COLOR_BUFFER,
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COGL_PIXEL_FORMAT_RGBA_8888_PRE,
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pixels);
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/* Make sure every pixel is the appropriate color */
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for (p = pixels;
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p < pixels + ((TEXTURE_RENDER_SIZE - TEST_INSET * 2)
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* (TEXTURE_RENDER_SIZE - TEST_INSET * 2));
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p += 4)
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{
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if (p[0] != (shown ? 255 : 0))
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ret = FALSE;
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if (p[1] != 0)
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ret = FALSE;
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if (p[2] != 0)
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ret = FALSE;
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}
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g_free (pixels);
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return ret;
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}
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static void
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paint_test_backface_culling (TestState *state)
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{
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int i;
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CoglPipeline *pipeline = cogl_pipeline_new ();
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CoglColor clear_color;
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cogl_ortho (0, state->width, /* left, right */
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state->height, 0, /* bottom, top */
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-1, 100 /* z near, far */);
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cogl_color_init_from_4ub (&clear_color, 0x00, 0x00, 0x00, 0xff);
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cogl_clear (&clear_color, COGL_BUFFER_BIT_COLOR | COGL_BUFFER_BIT_STENCIL);
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cogl_pipeline_set_layer_texture (pipeline, 0, state->texture);
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cogl_pipeline_set_layer_filters (pipeline, 0,
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COGL_PIPELINE_FILTER_NEAREST,
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COGL_PIPELINE_FILTER_NEAREST);
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cogl_set_backface_culling_enabled (TRUE);
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cogl_push_matrix ();
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/* Render the scene twice - once with backface culling enabled and
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once without. The second time is translated so that it is below
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the first */
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for (i = 0; i < 2; i++)
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{
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float x1 = 0, x2, y1 = 0, y2 = (float)(TEXTURE_RENDER_SIZE);
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CoglTextureVertex verts[4];
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cogl_set_source (pipeline);
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memset (verts, 0, sizeof (verts));
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x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
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/* Draw a front-facing texture */
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cogl_rectangle (x1, y1, x2, y2);
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x1 = x2;
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x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
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/* Draw a front-facing texture with flipped texcoords */
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cogl_rectangle_with_texture_coords (x1, y1, x2, y2,
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1.0, 0.0, 0.0, 1.0);
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x1 = x2;
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x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
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/* Draw a back-facing texture */
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cogl_rectangle (x2, y1, x1, y2);
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x1 = x2;
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x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
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/* If the texture is sliced then cogl_polygon doesn't work so
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we'll just use a solid color instead */
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if (cogl_texture_is_sliced (state->texture))
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cogl_set_source_color4ub (255, 0, 0, 255);
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/* Draw a front-facing polygon */
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verts[0].x = x1; verts[0].y = y2;
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verts[1].x = x2; verts[1].y = y2;
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verts[2].x = x2; verts[2].y = y1;
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verts[3].x = x1; verts[3].y = y1;
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verts[0].tx = 0; verts[0].ty = 0;
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verts[1].tx = 1.0; verts[1].ty = 0;
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verts[2].tx = 1.0; verts[2].ty = 1.0;
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verts[3].tx = 0; verts[3].ty = 1.0;
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cogl_polygon (verts, 4, FALSE);
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x1 = x2;
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x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
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/* Draw a back-facing polygon */
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verts[0].x = x1; verts[0].y = y1;
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verts[1].x = x2; verts[1].y = y1;
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verts[2].x = x2; verts[2].y = y2;
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verts[3].x = x1; verts[3].y = y2;
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verts[0].tx = 0; verts[0].ty = 0;
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verts[1].tx = 1.0; verts[1].ty = 0;
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verts[2].tx = 1.0; verts[2].ty = 1.0;
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verts[3].tx = 0; verts[3].ty = 1.0;
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cogl_polygon (verts, 4, FALSE);
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x1 = x2;
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x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
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/* Draw a regular rectangle (this should always show) */
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cogl_set_source_color4f (1.0, 0, 0, 1.0);
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cogl_rectangle (x1, y1, x2, y2);
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/* The second time round draw beneath the first with backface
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culling disabled */
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cogl_translate (0, TEXTURE_RENDER_SIZE, 0);
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cogl_set_backface_culling_enabled (FALSE);
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}
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cogl_object_unref (pipeline);
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cogl_pop_matrix ();
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}
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static void
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validate_result (int y_offset)
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{
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/* Front-facing texture */
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g_assert (validate_part (0, y_offset + 0, TRUE));
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/* Front-facing texture with flipped tex coords */
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g_assert (validate_part (1, y_offset + 0, TRUE));
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/* Back-facing texture */
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g_assert (validate_part (2, y_offset + 0, FALSE));
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/* Front-facing texture polygon */
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g_assert (validate_part (3, y_offset + 0, TRUE));
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/* Back-facing texture polygon */
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g_assert (validate_part (4, y_offset + 0, FALSE));
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/* Regular rectangle */
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g_assert (validate_part (5, y_offset + 0, TRUE));
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/* Backface culling disabled - everything should be shown */
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/* Front-facing texture */
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g_assert (validate_part (0, y_offset + 1, TRUE));
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/* Front-facing texture with flipped tex coords */
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g_assert (validate_part (1, y_offset + 1, TRUE));
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/* Back-facing texture */
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g_assert (validate_part (2, y_offset + 1, TRUE));
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/* Front-facing texture polygon */
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g_assert (validate_part (3, y_offset + 1, TRUE));
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/* Back-facing texture polygon */
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g_assert (validate_part (4, y_offset + 1, TRUE));
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/* Regular rectangle */
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g_assert (validate_part (5, y_offset + 1, TRUE));
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}
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static void
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paint (TestState *state)
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{
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float stage_viewport[4];
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CoglMatrix stage_projection;
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CoglMatrix stage_modelview;
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paint_test_backface_culling (state);
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/*
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* Now repeat the test but rendered to an offscreen
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* framebuffer. Note that by default the conformance tests are
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* always run to an offscreen buffer but we might as well have this
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* check anyway in case it is being run with COGL_TEST_ONSCREEN=1
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*/
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cogl_get_viewport (stage_viewport);
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cogl_get_projection_matrix (&stage_projection);
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cogl_get_modelview_matrix (&stage_modelview);
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cogl_push_framebuffer (state->offscreen);
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cogl_set_viewport (stage_viewport[0],
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stage_viewport[1],
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stage_viewport[2],
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stage_viewport[3]);
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cogl_set_projection_matrix (&stage_projection);
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cogl_set_modelview_matrix (&stage_modelview);
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paint_test_backface_culling (state);
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cogl_pop_framebuffer ();
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/* Incase we want feedback of what was drawn offscreen we draw it
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* to the stage... */
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cogl_set_source_texture (state->offscreen_tex);
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cogl_rectangle (0, TEXTURE_RENDER_SIZE * 2,
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stage_viewport[2],
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stage_viewport[3] + TEXTURE_RENDER_SIZE * 2);
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validate_result (0);
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validate_result (2);
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}
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static CoglHandle
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make_texture (void)
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{
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guchar *tex_data, *p;
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CoglHandle tex;
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tex_data = g_malloc (TEXTURE_SIZE * TEXTURE_SIZE * 4);
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for (p = tex_data + TEXTURE_SIZE * TEXTURE_SIZE * 4; p > tex_data;)
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{
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*(--p) = 255;
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*(--p) = 0;
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*(--p) = 0;
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*(--p) = 255;
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}
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tex = cogl_texture_new_from_data (TEXTURE_SIZE,
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TEXTURE_SIZE,
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COGL_TEXTURE_NO_ATLAS,
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COGL_PIXEL_FORMAT_RGBA_8888,
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COGL_PIXEL_FORMAT_ANY,
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TEXTURE_SIZE * 4,
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tex_data);
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g_free (tex_data);
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return tex;
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}
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void
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test_cogl_backface_culling (TestUtilsGTestFixture *fixture,
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void *data)
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{
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TestUtilsSharedState *shared_state = data;
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TestState state;
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CoglHandle tex;
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state.fb = shared_state->fb;
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state.width = cogl_framebuffer_get_width (shared_state->fb);
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state.height = cogl_framebuffer_get_height (shared_state->fb);
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state.offscreen = COGL_INVALID_HANDLE;
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state.texture = make_texture ();
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tex = cogl_texture_new_with_size (state.width, state.height,
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COGL_TEXTURE_NO_SLICING,
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COGL_PIXEL_FORMAT_ANY); /* internal fmt */
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state.offscreen = cogl_offscreen_new_to_texture (tex);
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state.offscreen_tex = tex;
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paint (&state);
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cogl_object_unref (state.offscreen);
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cogl_handle_unref (state.offscreen_tex);
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cogl_handle_unref (state.texture);
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if (g_test_verbose ())
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g_print ("OK\n");
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}
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