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6436cd073d
This declares the interface types CoglFramebuffer, CoglBuffer, CoglTexture, CoglMetaTexture and CoglPrimitiveTexture as void when including the public cogl.h header so that users don't have to use lots of C type casts between instance types and interface types. This also removes all of the COGL_XYZ() type cast macros since they do nothing more than compile time type casting but it's less readable if you haven't seen that coding pattern before. Unlike with gobject based apis that use per-type macros for casting and performing runtime type checking we instead prefer to do our runtime type checking internally within the front-end public apis when objects are passed into Cogl. This greatly reduces the verbosity for users of the api and may help reduce the chance of excessive runtime type checking that can sometimes be a problem. (cherry picked from commit 248a76f5eac7e5ae4fb45208577f9a55360812a7) Since we can't break the 1.x api this version of the patch actually defines compatible NOP macros within deprecated/cogl-type-casts.h
314 lines
9.4 KiB
C
314 lines
9.4 KiB
C
#define COGL_VERSION_MIN_REQUIRED COGL_VERSION_1_0
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#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 2
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/* Size to actually render the texture at */
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#define TEXTURE_RENDER_SIZE 8
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typedef struct _TestState
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{
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CoglTexture *texture;
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CoglFramebuffer *offscreen;
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CoglTexture *offscreen_tex;
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int width, height;
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} TestState;
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static void
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validate_part (CoglFramebuffer *framebuffer,
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int xnum, int ynum, CoglBool shown)
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{
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test_utils_check_region (framebuffer,
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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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shown ? 0xff0000ff : 0x000000ff);
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}
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/* We draw everything 16 times. The draw number is used as a bitmask
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to test all of the combinations of enabling legacy state, both
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winding orders and all four culling modes */
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#define USE_LEGACY_STATE(draw_num) (((draw_num) & 0x01) >> 0)
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#define FRONT_WINDING(draw_num) (((draw_num) & 0x02) >> 1)
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#define CULL_FACE_MODE(draw_num) (((draw_num) & 0x0c) >> 2)
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static void
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paint_test_backface_culling (TestState *state,
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CoglFramebuffer *framebuffer)
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{
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int draw_num;
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CoglPipeline *base_pipeline = cogl_pipeline_new (test_ctx);
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cogl_framebuffer_orthographic (framebuffer,
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0, 0,
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state->width,
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state->height,
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-1,
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100);
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cogl_framebuffer_clear4f (framebuffer,
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COGL_BUFFER_BIT_COLOR | COGL_BUFFER_BIT_STENCIL,
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0, 0, 0, 1);
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cogl_pipeline_set_layer_texture (base_pipeline, 0, state->texture);
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cogl_pipeline_set_layer_filters (base_pipeline, 0,
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COGL_PIPELINE_FILTER_NEAREST,
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COGL_PIPELINE_FILTER_NEAREST);
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cogl_push_framebuffer (framebuffer);
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/* Render the scene sixteen times to test all of the combinations of
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cull face mode, legacy state and winding orders */
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for (draw_num = 0; draw_num < 16; draw_num++)
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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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CoglPipeline *pipeline;
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cogl_push_matrix ();
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cogl_translate (0, TEXTURE_RENDER_SIZE * draw_num, 0);
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pipeline = cogl_pipeline_copy (base_pipeline);
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cogl_set_backface_culling_enabled (USE_LEGACY_STATE (draw_num));
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cogl_pipeline_set_front_face_winding (pipeline, FRONT_WINDING (draw_num));
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cogl_pipeline_set_cull_face_mode (pipeline, CULL_FACE_MODE (draw_num));
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cogl_push_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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cogl_pop_matrix ();
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cogl_pop_source ();
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cogl_object_unref (pipeline);
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}
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cogl_pop_framebuffer ();
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cogl_object_unref (base_pipeline);
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}
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static void
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validate_result (CoglFramebuffer *framebuffer, int y_offset)
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{
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int draw_num;
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for (draw_num = 0; draw_num < 16; draw_num++)
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{
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CoglBool cull_front, cull_back;
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CoglPipelineCullFaceMode cull_mode;
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if (USE_LEGACY_STATE (draw_num))
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cull_mode = COGL_PIPELINE_CULL_FACE_MODE_BACK;
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else
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cull_mode = CULL_FACE_MODE (draw_num);
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switch (cull_mode)
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{
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case COGL_PIPELINE_CULL_FACE_MODE_NONE:
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cull_front = FALSE;
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cull_back = FALSE;
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break;
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case COGL_PIPELINE_CULL_FACE_MODE_FRONT:
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cull_front = TRUE;
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cull_back = FALSE;
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break;
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case COGL_PIPELINE_CULL_FACE_MODE_BACK:
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cull_front = FALSE;
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cull_back = TRUE;
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break;
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case COGL_PIPELINE_CULL_FACE_MODE_BOTH:
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cull_front = TRUE;
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cull_back = TRUE;
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break;
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}
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if (FRONT_WINDING (draw_num) == COGL_WINDING_CLOCKWISE)
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{
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CoglBool tmp = cull_front;
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cull_front = cull_back;
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cull_back = tmp;
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}
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/* Front-facing texture */
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validate_part (framebuffer,
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0, y_offset + draw_num, !cull_front);
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/* Front-facing texture with flipped tex coords */
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validate_part (framebuffer,
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1, y_offset + draw_num, !cull_front);
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/* Back-facing texture */
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validate_part (framebuffer,
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2, y_offset + draw_num, !cull_back);
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/* Front-facing texture polygon */
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validate_part (framebuffer,
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3, y_offset + draw_num, !cull_front);
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/* Back-facing texture polygon */
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validate_part (framebuffer,
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4, y_offset + draw_num, !cull_back);
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}
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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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CoglPipeline *pipeline;
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paint_test_backface_culling (state, test_fb);
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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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paint_test_backface_culling (state, state->offscreen);
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/* Copy the result of the offscreen rendering for validation and
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* also so we can have visual feedback. */
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pipeline = cogl_pipeline_new (test_ctx);
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cogl_pipeline_set_layer_texture (pipeline, 0, state->offscreen_tex);
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cogl_framebuffer_draw_rectangle (test_fb,
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pipeline,
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0, TEXTURE_RENDER_SIZE * 16,
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state->width,
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state->height + TEXTURE_RENDER_SIZE * 16);
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cogl_object_unref (pipeline);
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validate_result (test_fb, 0);
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validate_result (test_fb, 16);
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}
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static CoglTexture *
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make_texture (void)
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{
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guchar *tex_data, *p;
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CoglTexture *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 = test_utils_texture_new_from_data (test_ctx,
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TEXTURE_SIZE,
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TEXTURE_SIZE,
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TEST_UTILS_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_backface_culling (void)
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{
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TestState state;
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CoglTexture *tex;
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state.width = cogl_framebuffer_get_width (test_fb);
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state.height = cogl_framebuffer_get_height (test_fb);
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state.offscreen = NULL;
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state.texture = make_texture ();
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tex = test_utils_texture_new_with_size (test_ctx,
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state.width, state.height,
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TEST_UTILS_TEXTURE_NO_SLICING,
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COGL_PIXEL_FORMAT_ANY); /* internal
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format */
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state.offscreen = cogl_offscreen_new_with_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_object_unref (state.offscreen_tex);
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cogl_object_unref (state.texture);
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if (cogl_test_verbose ())
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g_print ("OK\n");
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}
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