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| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WebGL BlitFramebuffer Tests</title> |
| <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| <script src="../../js/js-test-pre.js"></script> |
| <script src="../../js/webgl-test-utils.js"></script> |
| </head> |
| <body> |
| <canvas id="example" width="8" height="8"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| |
| <script> |
| "use strict"; |
| |
| var wtu = WebGLTestUtils; |
| description("This test verifies the functionality of blitFramebuffer when scissor test is enabled."); |
| |
| var gl = wtu.create3DContext("example", undefined, 2); |
| |
| // Define the src region and dst region for blitFramebuffer |
| var blit_src = [0, 0, 4, 4]; |
| var blit_dst = [2, 2, 6, 6]; |
| |
| if (!gl) { |
| testFailed("WebGL context does not exist"); |
| } else { |
| testPassed("WebGL context exists"); |
| |
| var bounds = [ |
| [0, 0, 4, 4], // Partially intersects with blitFramebuffer's dst region |
| [0, 0, 2, 2], // No intersection with blitFramebuffer's dst region |
| ]; |
| |
| // We can compute the real drawing area by intersecting the scissor bound with dst region of blitting. |
| var intersections = [ |
| [2, 2, 4, 4], |
| [0, 0, 0, 0], |
| ]; |
| |
| for (var ii = 0; ii < bounds.length; ++ii) { |
| blitframebuffer_scissor(gl.RGBA8, gl.RGBA8, bounds[ii], intersections[ii]); |
| blitframebuffer_scissor(gl.RGBA8, gl.SRGB8_ALPHA8, bounds[ii], intersections[ii]); |
| blitframebuffer_scissor(gl.SRGB8_ALPHA8, gl.RGBA8, bounds[ii], intersections[ii]); |
| blitframebuffer_scissor(gl.SRGB8_ALPHA8, gl.SRGB8_ALPHA8, bounds[ii], intersections[ii]); |
| } |
| } |
| |
| function checkPixel(color, expectedColor) { |
| var tolerance = 3; |
| return (Math.abs(color[0] - expectedColor[0]) <= tolerance && |
| Math.abs(color[1] - expectedColor[1]) <= tolerance && |
| Math.abs(color[2] - expectedColor[2]) <= tolerance && |
| Math.abs(color[3] - expectedColor[3]) <= tolerance); |
| } |
| |
| function blitframebuffer_scissor(readbufferFormat, drawbufferFormat, bound, intersection) { |
| debug(""); |
| debug("read buffer format is: " + wtu.glEnumToString(gl, readbufferFormat) + ", draw buffer format is: " + wtu.glEnumToString(gl, drawbufferFormat)); |
| |
| |
| // Initiate data to read framebuffer |
| var size = 8; |
| var data = new Uint8Array(size * size * 4); |
| var color = [250, 100, 15, 255]; |
| for (var ii = 0; ii < size * size * 4; ii += 4) { |
| for (var jj = 0; jj < 4; ++jj) { |
| data[ii + jj] = color[jj]; |
| } |
| } |
| |
| // Feed data to read buffer. Feed 0 to draw buffer. |
| var tex_read = gl.createTexture(); |
| gl.bindTexture(gl.TEXTURE_2D, tex_read); |
| gl.texImage2D(gl.TEXTURE_2D, 0, readbufferFormat, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, data); |
| |
| var fbo_read = gl.createFramebuffer(); |
| gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_read); |
| gl.framebufferTexture2D(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex_read, 0); |
| |
| var tex_draw = gl.createTexture(); |
| gl.bindTexture(gl.TEXTURE_2D, tex_draw); |
| gl.texImage2D(gl.TEXTURE_2D, 0, drawbufferFormat, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, null); |
| |
| var fbo_draw = gl.createFramebuffer(); |
| gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, fbo_draw); |
| gl.framebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex_draw, 0); |
| if (gl.checkFramebufferStatus(gl.READ_FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE || gl.checkFramebufferStatus(gl.DRAW_FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) { |
| testFailed("Framebuffer incomplete."); |
| return; |
| } |
| |
| // Enable scissor test. Then blit framebuffer. |
| gl.enable(gl.SCISSOR_TEST); |
| gl.scissor(bound[0], bound[1], bound[2], bound[3]); |
| gl.blitFramebuffer(blit_src[0], blit_src[1], blit_src[2], blit_src[3], blit_dst[0], blit_dst[1], blit_dst[2], blit_dst[3], gl.COLOR_BUFFER_BIT, gl.LINEAR); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "blitframebuffer should succeed"); |
| |
| // Read pixels and Comparison |
| var pixels = new Uint8Array(size * size * 4); |
| gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_draw); |
| gl.readPixels(0, 0, size, size, gl.RGBA, gl.UNSIGNED_BYTE, pixels); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "readPixels should succeed"); |
| |
| var blitColor; |
| var expectedColor; |
| var clearColor = [0, 0, 0, 0]; |
| |
| if (readbufferFormat == drawbufferFormat) { |
| blitColor = color; |
| } else if (readbufferFormat == gl.SRGB8_ALPHA8) { |
| blitColor = wtu.sRGBToLinear(color); |
| } else { |
| blitColor = wtu.linearToSRGB(color); |
| } |
| |
| var failed = false; |
| for (var ii = 0; ii < size; ++ii) { |
| for (var jj = 0; jj < size; ++jj) { |
| if (ii >= intersection[0] && jj >= intersection[1] && ii < intersection[2] && jj < intersection[3]) { |
| expectedColor = blitColor; |
| } else { |
| expectedColor = clearColor; |
| } |
| var index = (ii * size + jj) * 4; |
| var pixelColor = [pixels[index], pixels[index + 1], pixels[index + 2], pixels[index + 3]]; |
| if (checkPixel(pixelColor, expectedColor) == false) { |
| failed = true; |
| debug("Pixels comparison failed. Pixel at [" + jj + ", " + ii + "] should be (" + expectedColor + "), but the actual color is (" + pixelColor + ")"); |
| } |
| } |
| } |
| if (failed == false) { |
| testPassed("All pixels comparision passed!"); |
| } |
| |
| // Deinit |
| gl.bindTexture(gl.TEXTURE_2D, null); |
| gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null); |
| gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, null); |
| gl.deleteFramebuffer(fbo_read); |
| gl.deleteFramebuffer(fbo_draw); |
| gl.deleteTexture(tex_read); |
| gl.deleteTexture(tex_draw); |
| }; |
| |
| var successfullyParsed = true; |
| </script> |
| <script src="../../js/js-test-post.js"></script> |
| |
| </body> |
| </html> |