src/gallium/state_trackers/python/tests/regress/fragment-shader/fragment-shader.py

#!/usr/bin/env python
##########################################################################
# 
# Copyright 2009 VMware, Inc.
# All Rights Reserved.
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# Permission is hereby granted, free of charge, to any person obtaining a
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# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
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# The above copyright notice and this permission notice (including the
# next paragraph) shall be included in all copies or substantial portions
# of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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from gallium import *

def make_image(surface):
    data = surface.get_tile_rgba8(0, 0, surface.width, surface.height)

    import Image
    outimage = Image.fromstring('RGBA', (surface.width, surface.height), data, "raw", 'RGBA', 0, 1)
    return outimage

def save_image(filename, surface):
    outimage = make_image(surface)
    outimage.save(filename, "PNG")

def test(dev, name):
    ctx = dev.context_create()

    width = 320
    height = 320
    minz = 0.0
    maxz = 1.0

    # disabled blending/masking
    blend = Blend()
    blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE
    blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE
    blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO
    blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO
    blend.colormask = PIPE_MASK_RGBA
    ctx.set_blend(blend)

    # depth/stencil/alpha
    depth_stencil_alpha = DepthStencilAlpha()
    depth_stencil_alpha.depth.enabled = 0
    depth_stencil_alpha.depth.writemask = 1
    depth_stencil_alpha.depth.func = PIPE_FUNC_LESS
    ctx.set_depth_stencil_alpha(depth_stencil_alpha)

    # rasterizer
    rasterizer = Rasterizer()
    rasterizer.front_winding = PIPE_WINDING_CW
    rasterizer.cull_mode = PIPE_WINDING_NONE
    rasterizer.scissor = 1
    ctx.set_rasterizer(rasterizer)

    # viewport
    viewport = Viewport()
    scale = FloatArray(4)
    scale[0] = width / 2.0
    scale[1] = -height / 2.0
    scale[2] = (maxz - minz) / 2.0
    scale[3] = 1.0
    viewport.scale = scale
    translate = FloatArray(4)
    translate[0] = width / 2.0
    translate[1] = height / 2.0
    translate[2] = (maxz - minz) / 2.0
    translate[3] = 0.0
    viewport.translate = translate
    ctx.set_viewport(viewport)

    # samplers
    sampler = Sampler()
    sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE
    sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE
    sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE
    sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE
    sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST
    sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST
    sampler.normalized_coords = 1
    ctx.set_fragment_sampler(0, sampler)

    # scissor
    scissor = Scissor()
    scissor.minx = 0
    scissor.miny = 0
    scissor.maxx = width
    scissor.maxy = height
    ctx.set_scissor(scissor)

    clip = Clip()
    clip.nr = 0
    ctx.set_clip(clip)

    # framebuffer
    cbuf = dev.texture_create(
        PIPE_FORMAT_X8R8G8B8_UNORM,
        width, height,
        tex_usage=PIPE_TEXTURE_USAGE_RENDER_TARGET,
    ).get_surface()
    fb = Framebuffer()
    fb.width = width
    fb.height = height
    fb.nr_cbufs = 1
    fb.set_cbuf(0, cbuf)
    ctx.set_framebuffer(fb)
    rgba = FloatArray(4);
    rgba[0] = 0.5
    rgba[1] = 0.5
    rgba[2] = 0.5
    rgba[3] = 0.5
    ctx.clear(PIPE_CLEAR_COLOR, rgba, 0.0, 0)

    # vertex shader
    vs = Shader('''
        VERT
        DCL IN[0], POSITION
        DCL IN[1], COLOR
        DCL OUT[0], POSITION
        DCL OUT[1], COLOR
        MOV OUT[0], IN[0]
        MOV OUT[1], IN[1]
        END
    ''')
    ctx.set_vertex_shader(vs)

    # fragment shader
    fs = Shader(file('frag-' + name + '.sh', 'rt').read())
    ctx.set_fragment_shader(fs)

    xy = [
        -0.8, -0.8,
         0.8, -0.8,
         0.0,  0.8,
    ]
    color = [
        1.0, 0.0, 0.0,
        0.0, 1.0, 0.0,
        0.0, 0.0, 1.0,
    ]

    nverts = 3
    nattrs = 2
    verts = FloatArray(nverts * nattrs * 4)

    for i in range(0, nverts):
        verts[i * nattrs * 4 + 0] = xy[i * 2 + 0] # x
        verts[i * nattrs * 4 + 1] = xy[i * 2 + 1] # y
        verts[i * nattrs * 4 + 2] = 0.5 # z
        verts[i * nattrs * 4 + 3] = 1.0 # w
        verts[i * nattrs * 4 + 4] = color[i * 3 + 0] # r
        verts[i * nattrs * 4 + 5] = color[i * 3 + 1] # g
        verts[i * nattrs * 4 + 6] = color[i * 3 + 2] # b
        verts[i * nattrs * 4 + 7] = 1.0 # a

    ctx.draw_vertices(PIPE_PRIM_TRIANGLES,
                      nverts,
                      nattrs,
                      verts)

    ctx.flush()

    save_image('frag-' + name + '.png', cbuf)

def main():
    tests = [
        'abs',
        'add',
        'dp3',
        'dp4',
        'dst',
        'ex2',
        'flr',
        'frc',
        'lg2',
        'lit',
        'lrp',
        'mad',
        'max',
        'min',
        'mov',
        'mul',
        'rcp',
        'rsq',
        'sge',
        'slt',
        'srcmod-abs',
        'srcmod-absneg',
        'srcmod-neg',
        'srcmod-swz',
        'sub',
        'xpd',
    ]

    dev = Device()
    for t in tests:
        test(dev, t)

if __name__ == '__main__':
    main()